CCNA 3-Chapter 4 Answer. CCNA Exploration: LAN Switching and Wireless ANSWER (Version 4.0)

CCNA 3-Chapter 4 Answer. CCNA Exploration: LAN Switching and Wireless ANSWER (Version 4.0)

1. Which statement is true when VTP is configured on a switched network that incorporates VLANs?
VTP is only compatible with the 802.1Q standard.
VTP adds to the complexity of managing a switched network.
VTP allows a switch to be configured to belong to more than one VTP domain.
VTP dynamically communicates VLAN changes to all switches in the same VTP domain.

2.

Refer to the exhibit. What information can be learned from the output provided?
It verifies the configured VTP password.
It verifies the VTP domain is configured to use VTP version 2.
It verifies VTP advertisements are being exchanged.
It verifies the VTP domain name is V1.


3.

Refer to the exhibit. Which two facts can be confirmed by this output? (Choose two.)
If this switch is added to an established network, the other VTP-enabled switches in the same VTP domain will consider their own VLAN information to be more recent than the VLAN information advertised by this switch.
This switch shows no configuration revision errors.
This switch has established two-way communication with the neighboring devices.
This switch is configured to advertise its VLAN configuration to other VTP-enabled switches in the same VTP domain.
This switch is configured to allows the network manager to maximize bandwidth by restricting traffic to specific network devices.


4. A network administrator is replacing a failed switch with a switch that was previously on the network. What precautionary step should the administrator take on the replacement switch to avoid incorrect VLAN information from propagating through the network?
Enable VTP pruning.
Change the VTP domain name.
Change the VTP mode to client.
Change all the interfaces on the switch to access ports.

5. Which two statements are true about VTP pruning? (Choose two.)
Pruning is enabled by default.
Pruning can only be configured on VTP servers.
Pruning must be configured on all VTP servers in the domain.
VLANs on VTP client-mode switches will not be pruned.
Pruning will prevent unnecessary flooding of broadcasts across trunks.

6. What are two features of VTP client mode operation? (Choose two.)
unable to add VLANs
can add VLANs of local significance
forward broadcasts out all ports with no respect to VLAN information
can only pass VLAN management information without adopting changes
can forward VLAN information to other switches in the same VTP domain

7. What does a client mode switch in a VTP management domain do when it receives a summary advertisement with a revision number higher than its current revision number?
It suspends forwarding until a subset advertisement update arrives.
It issues an advertisement request for new VLAN information.
It increments the revision number and forwards it to other switches.
It deletes the VLANs not included in the summary advertisement.
It issues summary advertisements to advise other switches of status changes.

8.

Refer to the exhibit. Switch1 is not participating in the VTP management process with the other switches that are shown in the exhibit. What are two possible explanations for this? (Choose two.)
Switch1 is in client mode.
Switch2 is in server mode.
Switch2 is in transparent mode.
Switch1 is in a different management domain.
Switch1 has end devices that are connected to the ports.
Switch1 is using VTP version 1, and Switch2 is using VTP version 2.

9.

Refer to the exhibit. All switches in the network participate in the same VTP domain. What happens when the new switch SW2 with a default configuration and revision number of 0 is inserted in the existing VTP domain Lab_Network?
The switch operates as a VTP client.
The switch operates in VTP transparent mode.
The switch operates as a VTP server and deletes the existing VLAN configuration in the domain.
The switch operates as a VTP server, but does not impact the existing VLAN configuration in the domain.
The switch operates as a VTP server in the default VTP domain and does not affect the configuration in the existing VTP domain.

10.

Refer to the exhibit. Switches SW1 and SW2 are interconnected via a trunk link but failed to exchange VLAN information. The network administrator issued the show vtp status command to troubleshoot the problem. On the basis of the provided command output, what could be done to correct the problem?
Switch SW2 must be configured as a VTP client.
The switches must be interconnected via an access link.
The switches must be configured with the same VTP domain name.
Both switches must be configured with the same VTP revision number.

11. Which two statements describe VTP transparent mode operation? (Choose two.)
Transparent mode switches can create VLAN management information.
Transparent mode switches can add VLANs of local significance only.
Transparent mode switches pass any VLAN management information that they receive to other switches.
Transparent mode switches can adopt VLAN management changes that are received from other switches.
Transparent mode switches originate updates about the status of their VLANS and inform other switches about that status.

12.

Refer to the exhibit. All switches in the VTP domain are new. Switch SW1 is configured as a VTP server, switches SW2 and SW4 are configured as VTP clients, and switch SW3 is configured in VTP transparent mode. Which switch or switches receive VTP updates and synchronize their VLAN configuration based on those updates?
All switches receive updates and synchronize VLAN information.
Only switch SW2 receives updates and synchronizes VLAN information.
Only switches SW3 and SW4 receive updates and synchronize VLAN information.
SW3 and SW4 receive updates, but only switch SW4 synchronizes VLAN information.

13.

Refer to the exhibit. Switch S1 is in VTP server mode. Switches S2 and S3 are in client mode. An administrator accidentally disconnects the cable from F0/1 on S2. What will the effect be on S2?
S2 will retain the VLANs as of the latest known revision.
S2 will automatically transition to VTP transparent mode.
S2 will remove all VLANs from the VLAN database until the cable is reconnected.
S2 will automatically send a VTP request advertisement to 172.17.99.11 when the cable is reconnected.

14. What causes a VTP configured switch to issue a summary advertisement?
A five-minute update timer has elapsed.
A port on the switch has been shutdown.
The switch is changed to the transparent mode.
A new host has been attached to a switch in the management domain.

15. How are VTP messages sent between switches in a domain?
Layer 2 broadcast
Layer 2 multicast
Layer 2 unicast
Layer 3 broadcast
Layer 3 multicast
Layer 3 unicast

16.

Refer to the exhibit. The switches in the exhibit are connected with trunks within the same VTP management domain. Each switch is labeled with its VTP mode. A new VLAN is added to Switch3. This VLAN does not show up on the other switches. What is the reason for this?
VLANs cannot be created on transparent mode switches.
Transparent mode switches do not forward VTP advertisements.
VLANs created on transparent mode switches are not included in VTP advertisements.
Server mode switches neither listen to nor forward VTP messages from transparent mode switches.

17. Which two statements are true about the implementation of VTP? (Choose two.)
Switches must be connected via trunks.
The VTP domain name is case sensitive.
Transparent mode switches cannot be configured with new VLANs.
The VTP password is mandatory and case sensitive.
Switches that use VTP must have the same switch name.

18. Which three VTP parameters must be identical on all switches to participate in the same VTP domain? (Choose three.)
revision number
domain name
pruning
mode
domain password
version number

19. What statement describes the default propagation of VLANs on a trunked link?
only the native VLAN
VLANs 1 to 1005
only VLAN 1
all VLANs
no VLANs

20.

Refer to the exhibit. S2 was previously used in a lab environment and has been added to the production network in server mode. The lab and production networks use the same VTP domain name, so the network administrator made no configuration changes to S2 before adding it to the production network. The lab domain has a higher revision number. After S2 was added to the production network, many computers lost network connectivity. What will solve the problem?
Reset the revision number on S2 with either the delete VTP command or by changing the domain name and then changing it back.
Re-enter all appropriate VLANs, except VLAN 1, manually on Switch1 so that they propagate throughout the network.
Change S1 to transparent VTP mode to reclaim all VLANs in vlan.dat and change back to server mode.
Change S2 to client mode so the VLANs will automatically propagate.

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CCNA 3 - Chapter 5 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

CCNA 3 - Chapter 5 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

1. Which two criteria does a switch use to select the root bridge? (Choose two.)
bridge priority
switching speed
number of ports
base MAC address
switch location
memory size

2. Which two statements are true about the default operation of STP in a Layer 2 switched environment that has redundant connections between switches? (Choose two.)
The root switch is the switch with the highest speed ports.
Decisions on which port to block when two ports have equal cost depend on the port priority and identity.
All trunking ports are designated and not blocked.
Root switches have all ports set as root ports.
Non-root switches each have only one root port.


3.

Refer to the exhibit. All switches in the network have empty MAC tables. STP has been disabled on the switches in the network. How will a broadcast frame that is sent by host PC1 be handled on the network?
Switch SW1 will block the broadcast and drop the frame.
Switch SW1 will forward the broadcast out all switch ports, except the originating port. This will generate an endless loop in the network.
Switch SW1 will forward the broadcast out all switch ports, except the originating port. All hosts in the network will reply with a unicast frame sent to host PC1.
Switch SW1 will forward the traffic out all switch ports except the originating port as a unicast frame. All hosts in the network will reply with a unicast frame sent to switch SW1.

4. Which two statements describe the BIDs used in a spanning tree topology? (Choose two.)
They are sent out by the root bridge only after the inferior BPDUs are sent.
They consist of a bridge priority and MAC address.
Only the root bridge will send out a BID.
They are used by the switches in a spanning tree topology to elect the root bridge.
The switch with the fastest processor will have the lowest BID.

5. Which statement or set of paired statements correctly compares STP with RSTP?
STP and RSTP have the same BPDU format and flag field information.
STP specifies backup ports. RSTP has only root ports, alternate ports, and designated ports.
STP port states are independent of port roles. RSTP ties together the port state and port role.
STP waits for the network to converge before placing ports into forwarding state. RSTP places designated ports into forwarding state immediately.

6. How can a network administrator influence which STP switch becomes the root bridge?
Configure all the interfaces on the switch as the static root ports.
Change the BPDU to a lower value than that of the other switches in the network.
Assign a lower IP address to the switch than that of the other switches in the network.
Set the switch priority to a smaller value than that of the other switches in the network.

7. In which STP state does a port record MAC addresses but not forward user data?
blocking
learning
disabling
listening
forwarding

8. When PVST+ was developed, the Bridge ID was modified to include which information?
bridge priority
MAC address
protocol
VLAN ID

9. What is the first step in the process of convergence in a spanning tree topology?
election of the root bridge
blocking of the non-designated ports
selection of the designated trunk port
determination of the designated port for each segment

10. What two elements will exist in a converged network with one spanning tree? (Choose two.)
one root bridge per network
all non-designated ports forwarding
one root port per non-root bridge
multiple designated ports per segment
one designated port per network

11.

Refer to the exhibit. What can be determined from the output shown?
Two hosts communicating between ports Fa0/2 and Fa0/4 have a cost of 38.
The priority was statically configured to identify the root.
STP is disabled on this switch.
The timers have been altered to reduce convergence time.

12. What two features of the Spanning-Tree Protocol contribute to the time it takes for a switched network to converge after a topology change occurs? (Choose two.)
the max-age timer
the spanning-tree hold down timer
the forward delay
the spanning-tree path cost
the blocking delay

13. What three link types have been defined for Rapid Spanning-Tree Protocol? (Choose three.)
shared
end-to-end
edge-type
boundary-type
point-to-many
point-to-point

14.

Refer to the exhibit. The spanning-tree port priority of each interface is at the default setting. The network administrator enters the spanning-tree vlan 1 root primary command on S4. What is the effect of the command?
Spanning tree blocks Gi0/1 on S3.
Gi0/2 on S3 transitions to a root port.
Port priority makes Gi0/2 on S1 a root port.
S4 is already the root bridge, so there are no port changes.

15. In which two ways is the information that is contained in BPDUs used by switches? (Choose two.)
to negotiate a trunk between switches
to set the duplex mode of a redundant link
to identify the shortest path to the root bridge
to prevent loops by sharing bridging tables between connected switches
to determine which ports will forward frames as part of the spanning tree

16. What Rapid Spanning Tree Protocol (RSTP) role is assigned to the forwarding port elected for every Ethernet LAN segment that links two switches?
alternate
backup
designated
edge

17. Which two items are true regarding the spanning-tree portfast command? (Choose two.)
PortFast is Cisco proprietary.
PortFast can negatively effect DHCP services.
PortFast is used to more quickly prevent and eliminate bridging loops.
Enabling PortFast on trunks that connect to other switches improves convergence.
If an access port is configured with PortFast, it immediately transitions from a blocking to a forwarding state.

18. Which two actions does an RSTP edge port take if it receives a BPDU? (Choose two.)
immediately loses its edge status
inhibits the generation of a TCN
goes immediately to a learning state
disables itself
becomes a normal spanning-tree port

19.

Refer to the exhibit. Server sends an ARP request for the MAC address of its default gateway. If STP is not enabled, what will be the result of this ARP request?
Router_1 will drop the broadcast and reply with the MAC address of the next hop router.
Switch_A will reply with the MAC address of the Router_1 E0 interface.
Switch_A and Switch_B will continuously flood the message onto the network.
The message will cycle around the network until its TTL is exceeded.

20. Which three statements are accurate regarding RSTP and STP? (Choose three.)
RSTP uses a faster algorithm to determine root ports.
RSTP introduced the extended system ID to allow for more than 4096 VLANs.
Both RSTP and STP use the portfast command to allow ports to immediately transition to forwarding state.
Like STP PortFast, an RSTP edge port that receives a BPDU loses its edge port status immediately and becomes a normal spanning-tree port.
Configuration commands to establish primary and secondary root bridges are identical for STP and RSTP.
Because of the format of the BPDU packet, RSTP is backward compatible with STP.

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CCNA 3 - Chapter6 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

CCNA 3 - Chapter6 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

1. What are the steps which must be completed in order to enable inter-VLAN routing using router-on-a-stick?
Configure the physical interfaces on the router and enable a routing protocol.
Create the VLANs on the router and define the port membership assignments on the switch.
Create the VLANs on the switch to include port membership assignment and enable a routing protocol on the router.
Create the VLANs on the switch to include port membership assignment and configure subinterfaces on the router matching the VLANs.
2.

Refer to the exhibit. R1 is routing between networks 192.168.10.0/28 and 192.168.30.0/28. PC1 can ping R1 interface F0/1, but cannot ping PC3. What is causing this failure?
PC1 and PC3 are not in the same VLAN.
The PC3 network address configuration is incorrect.
The S1 interface F0/11 should be assigned to VLAN30.
The F0/0 and F0/1 interfaces on R1 must be configured as trunks.

3. Which statement is true about ARP when inter-VLAN routing is being used on the network?
When router-on-a-stick inter-VLAN routing is in use, each subinterface has a separate MAC address to send in response to ARP requests.
When VLANs are in use, the switch responds to ARP requests with the MAC address of the port to which the PC is connected.
When router-on-a-stick inter-VLAN routing is in use, the router returns the MAC address of the physical interface in response to ARP requests.
When traditional inter-VLAN routing is in use, devices on all VLANs use the same physical router interface as their source of proxy ARP responses.
4. In which situation could individual router physical interfaces be used for InterVLAN routing, instead of a router-on-a-stick configuration?
a network with more than 100 subnetworks
a network with a limited number of VLANs
a network with experienced support personnel
a network using a router with one LAN interface
5.

Refer to the exhibit. Switch1 is correctly configured for the VLANs that are displayed in the graphic. The configuration that is shown was applied to RTA to allow for interVLAN connectivity between hosts attached to Switch1. After testing the network, the administrator logged the following report:
Hosts within each VLAN can communicate with each other.
Hosts in VLAN5 and VLAN33 are able to communicate with each other.
Hosts connected to Fa0/1 through Fa0/5 do not have connectivity to host in other VLANs.
Why are hosts connected to Fa0/1 through Fa0/5 unable to communicate with hosts in different VLANs?
The router interface is shut down.
The VLAN IDs do not match the subinterface numbers.
All of the subinterface addresses on the router are in the same subnet.
The router was not configured to forward traffic for VLAN2.
The physical interface, FastEthernet0/0, was not configured with an IP address.
6. What is important to consider while configuring the subinterfaces of a router when implementing inter-VLAN routing?
The physical interface must have an IP address configured.
The subinterface numbers must match the VLAN ID number.
The no shutdown command must be given on each subinterface.
The IP address of each subinterface must be the default gateway address for each VLAN subnet.
7.

Refer to the exhibit. Which two statements are true about the operation of the subinterfaces? (Choose two.)
Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.
Incoming traffic with VLAN ID 0 is processed by interface fa0/0.
Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardware address.
Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated.
Reliability of both subinterfaces is poor because ARP is timing out.
Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down.
8.

Refer to the exhibit. The commands for a router to connect to a trunked uplink are shown in the exhibit. A packet is received from IP address 192.168.1.54. The packet destination address is 192.168.1.120. What will the router do with this packet?
The router will forward the packet out interface FastEthernet 0/1.1 tagged for VLAN 10.
The router will forward the packet out interface FastEthernet 0/1.2 tagged for VLAN 60.
The router will forward the packet out interface FastEthernet 0/1.3 tagged for VLAN 120.
The router will not process the packet since the source and destination are on the same subnet.
The router will drop the packet since no network that includes the source address is attached to the router.
9.

Refer to the exhibit. PC1 has attempted to ping PC2 but has been unsuccessful. What could account for this failure?
PC1 and R1 interface F0/0.1 are on different subnets.
The encapsulation is missing on the R1 interface F0/0.
An IP address has not been assigned to the R1 physical interface.
The encapsulation command on the R1 F0/0.3 interface is incorrect.
10.

Refer to the exhibit. What two conclusions can be drawn from the output that is shown? (Choose two.)
The no shutdown command has not been issued on the FastEthernet 0/0 interface.
Both of the directly connected routes that are shown will share the same physical interface of the router.
A routing protocol must be configured on the network in order for the inter-VLAN routing to be successful.
Inter-VLAN routing between hosts on the 172.17.10.0/24 and 172.17.30.0/24 networks is successful on this network.
Hosts in this network must be configured with the IP address that is assigned to the router physical interface as their default gateway.
11.

Refer to the exhibit. Which three statements describe the network design shown in the exhibit? (Choose three.)
This design will not scale easily.
The router merges the VLANs into a single broadcast domain.
This design uses more switch and router ports than are necessary.
This design exceeds the maximum number of VLANs that can be attached to a switch.
This design requires the use of the ISL or 802.1q protocol on the links between the switch and the router.
If the physical interfaces between the switch and router are operational, the devices on the different VLANs can communicate through the router.
12. Devices on the network are connected to a 24-port Layer 2 switch that is configured with VLANs. Switch ports 0/2 to 0/4 are assigned to VLAN 10. Ports 0/5 to 0/8 are assigned to VLAN 20, and ports 0/9 to 0/12 are assigned to VLAN 30. All other ports are assigned to the default VLAN. Which solution allows all VLANs to communicate between each other while minimizing the number of ports necessary to connect the VLANs?
Configure ports 0/13 to 0/16 with the appropriate IP addresses to perform routing between VLANs.
Add a router to the topology and configure one FastEthernet interface on the router with multiple subinterfaces for VLANs 1, 10, 20, and 30.
Obtain a router with multiple LAN interfaces and configure each interface for a separate subnet, thereby allowing communication between VLANs.
Obtain a Layer 3 switch and configure a trunk link between the switch and router, and configure the router physical interface with an IP address on the native VLAN.
13.

Refer to the exhibit. Port Fa0/0 on router R1 is connected to port Fa0/1 on switch S1. After the commands shown are entered on both devices, the network administrator determines that the devices on VLAN 2 are unable to ping the devices on VLAN 1. What is the likely problem?
R1 is configured for router-on-a-stick, but S1 is not configured for trunking.
R1 does not have the VLANs entered in the VLAN database.
Spanning Tree Protocol is blocking port Fa0/0 on R1.
The subinterfaces on R1 have not been brought up with the no shutdown command yet.
14. A router has two FastEthernet interfaces and needs to connect to four VLANs in the local network. How can this be accomplished using the fewest number of physical interfaces without unnecessarily decreasing network performance?
Implement a router-on-a-stick configuration.
Add a second router to handle the inter-VLAN traffic.
Use a hub to connect the four VLANS with a FastEthernet interface on the router.
Interconnect the VLANs via the two additional FastEthernet interfaces.
15. What distinguishes traditional routing from router-on-a-stick?
Traditional routing is only able to use a single switch interface. Router-on-a-stick can use multiple switch interfaces.
Traditional routing requires a routing protocol. Router-on-a-stick only needs to route directly connected networks.
Traditional routing uses one port per logical network. Router-on-a-stick uses subinterfaces to connect multiple logical networks to a single router port.
Traditional routing uses multiple paths to the router and therefore requires STP. Router-on-a-stick does not provide multiple connections and therefore eliminates the need for STP.
16. What two statements are true regarding the use of subinterfaces for inter-VLAN routing? (Choose two.)
subinterfaces have no contention for bandwidth
more switch ports required than in traditional inter-VLAN routing
fewer router ports required than in traditional inter-VLAN routing
simpler Layer 3 troubleshooting than with traditional inter-VLAN routing
less complex physical connection than in traditional inter-VLAN routing
17. Which three elements must be used when configuring a router interface for VLAN trunking? (Choose three.)
one subinterface per VLAN
one physical interface for each subinterface
one IP network or subnetwork for each subinterface
one trunked link per VLAN
a management domain for each subinterface
a compatible trunking protocol encapsulation for each subinterface
18.

Refer to the exhibit. The network administrator correctly configures RTA to perform inter-VLAN routing. The administrator connects RTA to port 0/4 on SW2, but inter-VLAN routing does not work. What could be the possible cause of the problem with the SW2 configuration?
Port 0/4 is not active.
Port 0/4 is not a member of VLAN1.
Port 0/4 is configured in access mode.
Port 0/4 is using the wrong trunking protocol.
19. Which two statements are true about the interface fa0/0.10 command? (Choose two.)
The command applies VLAN 10 to router interface fa0/0.
The command is used in the configuration of router-on-a-stick inter-VLAN routing.
The command configures a subinterface.
The command configures interface fa0/0 as a trunk link.
Because the IP address is applied to the physical interface, the command does not include an IP address.
20.

Refer to the exhibit. All devices are configured as shown in the exhibit. PC2 can successfully ping the F0/0 interface on R1. PC2 cannot ping PC1. What might be the reason for this failure?
R1 interface F0/1 has not been configured for subinterface operation.
S1 interface F0/6 needs to be configured for operation in VLAN10.
S1 interface F0/8 is in the wrong VLAN.
S1 port F0/6 is not in VLAN10.

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CCNA 3 - Chapter 7 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

CCNA 3 - Chapter 7 Answer_ CCNA Exploration: LAN Switching and Wireless (Version 4.0)

1. Which two statements concerning network security are accurate? (Choose two.)
802.11i uses 3DES for encryption.
Open authentication uses no client or AP verification.
The 802.11i protocol is functionally identical to WPA.
802.11i incorporates a RADIUS server for enterprise authentication.
A wireless client first associates with an AP and then authenticates for network access.

2. Which installation method will allow connectivity for a new wireless network?
set up WEP on the access point only
set up open access on both the access point and each device connected to it
set up full encryption on the access point while leaving each device connected to the network open
set up full encryption on each device of the WLAN while leaving the access point settings open


3. Which function is provided by a wireless access point?
dynamically assigns an IP address to the host
provides local DHCP services
converts data from 802.11 to 802.3 frame encapsulation
provides a gateway for connecting to other networks

4. What procedure can prevent man-in-the-middle attacks?
Force all devices on a WLAN to authenticate and monitor for any unknown devices.
Enable access points to send an SSID to each device wanting to use the network.
Configure MAC filtering on all authorized access points.
Disable SSID broadcasts.

5. What does a wireless access point use to allow WLAN clients to learn which networks are available in a given area?
association response
beacon
key
probe request

6. What wireless security feature allows a network administrator to configure an access point with wireless NIC unique identifiers so that only these NICs can connect to the wireless network?
authentication
SSID broadcasting
MAC address filtering
EAP (Extensible Authentication Protocol)
Radius (Remote Authentication Dial-In User Service)

7. Wireless users on a network complain about poor performance within a small area of a room. Moving away from this area in any direction improves performance dramatically. What is the first step in designing a solution to this problem?
This might be RF channel overlap, so the technician should verify the channels in use on each wireless access point and change to non-overlapping channels.
The RF power settings might be set too low on the wireless access points servicing the room. Increase the RF output power on all wireless access points.
Install a new wireless access point in this center area to provide coverage.
Verify that the wireless access points have sufficient in-line power and connectivity to the wired network.

8. Which two statements characterize wireless network security? (Choose two.)
A rogue access point represents a security risk for the local network.
Wireless networks offer the same security features as wired networks.
Using encryption prevents unauthorized clients from associating with an access point.
An attacker needs physical access to at least one network device to launch an attack.
With SSID broadcast disabled, an attacker must sniff the SSID before being able to connect.

9. Which network design process identifies where to place access points?
site survey
risk assessment
scalability design
network protocol analysis

10.

Refer to the exhibit. When configuring the wireless access point, which setting does the network administrator use to configure the unique identifier that client devices use to distinguish this wireless network from others?
Network Mode
Network Name (SSID)
Radio Band
Wide Channel
Standard Channel

11. Which two conditions have favored adoption of 802.11g over 802.11a? (Choose two.)
802.11a suffers from a shorter range than 802.11g.
The 2.4 GHz frequency band is not as crowded as the 5 GHz band.
802.11a is more susceptible to RF interference from common commercial items.
802.11a uses a more expensive modulation technique than 802.11g.
802.11g is backward compatible with 802.11b, but 802.11a is not.

12. What occurs when a rogue access point is added to a WLAN?
Authorized access points can transmit excess traffic to rogue access points to help alleviate congestion.
Unauthorized users can gain access to internal servers, thus causing a security hole.
All traffic that uses the same channel as the rogue access point will be encrypted.
All traffic that uses the same channel as the rogue access point will be required to authenticate.

13. In a WLAN network, why should wireless access points be implemented with each access point using a different channel?
to keep users segregated on separate subnets
to control the amount of bandwidth that is utilized
to keep signals from interfering with each other
to keep traffic secure

14. Which two statements are true regarding wireless security? (Choose two.)
MAC address filtering prevents the contents of wireless frames from being viewable.
Providing a wireless client with the network key allows an available network to be visible.
Disabling an access point from broadcasting the SSID prevents the access point from being discovered.
Default SSIDs on specific manufacturer APs are generally known and may permit hostile wireless connections.
Manually adding a network and setting the known SSID on a wireless client makes the network visible even if the SSID is not being broadcast.

15. Why is security so important in wireless networks?
Wireless networks are typically slower than wired networks.
Televisions and other devices can interfere with wireless signals.
Wireless networks broadcast data over a medium that allows easy access.
Environmental factors such as thunderstorms can affect wireless networks.

16. Which wireless technology standard provides the most compatibility with older wireless standards, but has greater performance?
802.11a
802.11b
802.11g
802.11n

17. Which three devices do many wireless routers incorporate? (Choose three.)
gateway for connecting to other network infrastructures
built-in Ethernet switch
network management station
VTP server
wireless access point
VPN concentrator

18. What will a wireless client transmit to discover the available WLAN networks?
beacon
password
probe request
association request

19. Which major problem does CSMA/CA overcome in wireless networks?
bandwidth saturation
privacy concerns
media contention
device interoperability

20. Which access method does a wireless access point use to allow for multiple user connectivity and distributed access?
CSMA/CD
token passing
CSMA/CA
polling

21. What purpose does authentication serve in a WLAN?
converts clear text data before transmission
indicates which channel the data should flow on
determines that the correct host is utilizing the network

1. New questions :
   Q)A network administrator is designing the wireless network for a law office. The security policy requires that the access to the wireless network must be authenticated with the credentials of employees. The administrator decides to use the PSK2 Enterprise authentication method. Which server is a requirement to deploy PSK2 Enterprise?
   TFTP
   HTTPS
   RADIUS
   IEEE 802.1x
   Q)Which statement is true about the SSID configuration of a wireless access point?
   The SSID is not case-sensitive.
   The SSID cannot exceed 32 characters.
   An SSID string cannot contain a space.
   Turning off SSID broadcasting makes the wireless network inaccessible.
   Q)Why are wireless LAN networks more vulnerable than wired Ethernet networks?
   Wireless network bandwidth is much slower.
   Wireless networks transmit data over the open space.
   Wireless signals share the same RF frequencies as household devices.
   Wireless networks use the CSMA/CA access method, which is less secure than CSMA/CD.
   Q)A network administrator is deploying three 2.4 GHz access points for the exhibit area of a large car dealer facility. What channel selection can be used on the three access points to avoid signal interference?
   channels 1, 5, 10
   channels 1, 6, 11
   channels 1, 7, 11
   channels 1, 8, 12
   Q)On a wireless network in a corporate environment that is using the CSMA/CA access method, how is the successful transmission of data packets by client stations indicated?
   The access point sends an acknowledgment to the sending client station that data has been received.
   The receiving host sends an acknowledgment to the sending client station that data has been received.
   The sending client monitors the RF energy change while transmitting data packets and making sure no other clients are transmitting data.
   The sending client station monitors the RF energy change for a pre-determined time period after it completes transmitting data to make sure its transmission is successful.
   

   Reply
   • Muhammad says:

     May 12, 2012 at 10:15 pm

     A network administrator is designing the wireless network for a law office. The security policy requires that the access to the wireless network must be authenticated with the credentials of employees. The administrator decides to use the PSK2 Enterprise authentication method. Which server is a requirement to deploy PSK2 Enterprise?
     TFTP
     HTTPS
     ***RADIUS
     IEEE 802.1x
     

     Reply
2. Student says:

   November 21, 2011 at 5:55 pm

   Answers in the same order
   1) RADIUS
   2) The SSID cannot exceed 32 characters.
   3) Wireless networks transmit data over the open space.
   4) channels 1, 6, 11
   5) The access point sends an acknowledgment to the sending client station that data has been received.
   

   Reply
   • student says:

     February 27, 2012 at 4:02 am

     Confirmed.
     

     Reply
   • student x says:

     February 29, 2012 at 11:27 pm

     Confirmed x2
     

     Reply
   • osama says:

     March 5, 2012 at 12:02 pm

     tnx
     

     Reply
   • ok says:

     March 7, 2012 at 2:32 pm

     confirm x3
     

     Reply
3. Peter says:

   November 28, 2011 at 8:01 pm

   I have error with this Q…. Why are wireless LAN networks more vulnerable than wired Ethernet networks?
   correct answer is : Wireless signals share the same RF frequencies as household devices.
   

   Reply
   • Al says:

     December 4, 2011 at 1:43 am

     WRONG!!! The answer is NOT “Wireless signals share the same RF frequencies as household devices.” The correct answer is…
     This item references content from the following areas:
     CCNA Exploration: LAN Switching and Wireless
     7.2.1 Threats to Wireless Security
     Why are wireless LAN networks more vulnerable than wired Ethernet networks?
     Wireless network bandwidth is much slower.
     Wireless networks transmit data over the open space.
     Wireless signals share the same RF frequencies as household devices.
     Wireless networks use the CSMA/CA access method, which is less secure than CSMA/CD.
     Observable Description Max Value Earned Value
     2 points for Option 2
     0 points for any other option
     

     Reply
     • F@YSAL says:

       December 13, 2011 at 7:59 am

       Al is 100 % right.
       The correct answer is :
       ” Wireless networks transmit data over the open space. “
       

       Reply
4. Student says:

   May 5, 2012 at 10:10 am

   Q)A network administrator is designing the wireless network for a law office. The security policy requires that the access to the wireless network must be authenticated with the credentials of employees. The administrator decides to use the PSK2 Enterprise authentication method. Which server is a requirement to deploy PSK2 Enterprise?
   TFTP
   HTTPS
   ** RADIUS
   IEEE 802.1x
   Q)Which statement is true about the SSID configuration of a wireless access point?
   The SSID is not case-sensitive.
   ** The SSID cannot exceed 32 characters.
   An SSID string cannot contain a space.
   Turning off SSID broadcasting makes the wireless network inaccessible.
   Q)Why are wireless LAN networks more vulnerable than wired Ethernet networks?
   Wireless network bandwidth is much slower.
   ** Wireless networks transmit data over the open space.
   Wireless signals share the same RF frequencies as household devices.
   Wireless networks use the CSMA/CA access method, which is less secure than CSMA/CD.
   Q)A network administrator is deploying three 2.4 GHz access points for the exhibit area of a large car dealer facility. What channel selection can be used on the three access points to avoid signal interference?
   channels 1, 5, 10
   ** channels 1, 6, 11
   channels 1, 7, 11
   channels 1, 8, 12
   Q)On a wireless network in a corporate environment that is using the CSMA/CA access method, how is the successful transmission of data packets by client stations indicated?
   ** The access point sends an acknowledgment to the sending client station that data has been received.
   The receiving host sends an acknowledgment to the sending client station that data has been received.
   The sending client monitors the RF energy change while transmitting data packets and making sure no other clients are transmitting data.
   The sending client station monitors the RF energy change for a pre-determined time period after it completes transmitting data to make sure its transmission is successful.
   Percentage:
   

   Reply
5. ok says:

   June 17, 2012 at 11:02 pm

   Which statement is true about the SSID configuration of a wireless access point?
   The SSID is not case-sensitive.
   The SSID cannot exceed 32 characters.
   An SSID string cannot contain a space.
   Turning off SSID broadcasting makes the wireless network inaccessible.
   

   Reply
6. ok says:

   June 17, 2012 at 11:04 pm

   Which statement is true about the SSID configuration of a wireless access point?
   The SSID is not case-sensitive.
   The SSID cannot exceed 32 characters.
   An SSID string cannot contain a space.
   Turning off SSID broadcasting makes the wireless network inaccessible
   

   Reply
7. francis says:

   August 1, 2012 at 12:13 pm

   Which function is provided by a wireless access point?
   dynamically assigns an IP address to the host
   provides local DHCP services
   ====converts data from 802.11 to 802.3 frame encapsulation
   provides a gateway for connecting to other networks
   

   Reply
8. Need-Help says:

   August 3, 2012 at 3:06 am

   Which statement is true about the SSID configuration of a wireless access point?
   -The SSID is not case-sensitive.
   **-The SSID cannot exceed 32 characters.**
   -An SSID string cannot contain a space.
   **-Turning off SSID broadcasting makes the wireless network inaccessible**
   What is the true answer?
   ** The SSID cannot exceed 32 characters.**
   ** Turning off SSID broadcasting makes the wireless network inaccessible**

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CCNA 3 - CCNA ESwitching Practice Final Exam (SCORE: 90)

CCNA 3 - CCNA ESwitching Practice Final Exam (SCORE: 90)

CCNA3 - ESwitching Practice Final Exam 1 Refer to the exhibit. After receiving a console notification on Switch2, the network administrator begins to troubleshoot the trunk link between Switch1 and Switch2. Which configuration change can be made to correct the problem with the trunk link? Set the Fa0/1 interface on Switch2 to trunk mode. Change the trunk encapsulation on Switch2 Fa0/1 to dot1q. Change the native VLAN on Switch2 interface Fa0/1 to VLAN 100. Change the access mode VLAN on Switch2 to the default VLAN 1.

2	Which two statements about a service set identifier (SSID) are true? (Choose two.) provides strong wireless security responsible for determining the signal strength tells a wireless device to which WLAN it belongs used to encrypt data sent across the wireless network all wireless devices on the same WLAN must have the same SSID

3	What is a possible impact of setting too short an aging time in the MAC address table of a switch? overly large address table unnecessary flooding of packets excessive timeouts of static addresses impaired ability to dynamically learn new addresses

4

Which three statements accurately describe VLAN types? (Choose three). A management VLAN is any VLAN that is configured to access management features of the switch. A data VLAN is used to carry VLAN management data and user-generated traffic. After the initial boot of an unconfigured switch, all ports are members of the default VLAN. An 802.1Q trunk port, with a native VLAN assigned, supports both tagged and untagged traffic. Voice VLANs are used to support user phone and e-mail traffic on a network. VLAN 1 is always used as the management VLAN.

5

Refer to the exhibit. Hosts B and C attempt to transmit a frame at the same time, but a collision occurs. Which hosts will receive the collision jamming signal? all hosts that are shown only hosts B and C only hosts A, B, and C only hosts A, B, C, and D only hosts A, D, E, and F only hosts D, E, and F

Refer to the exhibit. Which password allows the administrator to enter the privileged exec mode? cisco1 cisco2 cisco3 cisco

7	Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology? Cat-A Cat-B Cat-C Cat-D

8	Refer to the exhibit. Host A is sending a frame to host C. How does switch SWA tag the frame? It tags the frame with VLAN 1 and sends it to host C. It tags the frame with VLAN 10 and sends it to host C. It tags the frame with VLAN 99 and sends it to host C. It does not tag the frame and sends it to host C.

9

Refer to the exhibit. What three statements describe why Host1 and Host2 are unable to communicate? (Choose three.) The switch ports are on different VLANs. The switch IP address is on the wrong subnet. The hosts are configured on different logical networks. A router is required to forward traffic between Host1 and Host2. The VLAN port assignments must be contiguous for each VLAN. The host default gateway addresses must be on the same logical network.

10	Which parameter is associated with wireless authentication? shared key SSID ad hoc channel

11	Which benefit is gained by designing a network with a small network diameter? lower latency improved security increased redundancy higher interface bandwidth

12

A network technician is investigating a problem on a switch that seems to have overflowing buffers and is dropping packets on many incoming ports. On examination the technician discovers that the problem exists because the destination port attaches to a busy server. What is the best way to address this problem? (MAMANJOSH bliduwe jawaban soal kiyen.) Increase the amount of RAM on the switch. Change the switch to a symmetric switch. Use a switch that uses store-and-forward switching. Change the switch to one that uses shared memory buffering.

13	Which switching method provides error-free data transmission? fragment-free fast-forward integrity-checking store-and-forward

14	When implementing a router-on-a-stick, what must be configured on the router to ensure connectivity between different VLANs? subinterfaces routing protocol switched virtual circuits dynamic trunking protocol

15

After unpacking a new Linksys WRT300N wireless multifunction device, a user needs to change the default administrator password and make other configuration changes. What must the user do to access the device in order to make these changes? Use a wireless client to associate with the WRT300N and then open a HyperTerminal session with the device. Establish a wired connection with the device and then reboot the attached computer to launch the configuration software. Establish a wired connection from a computer in the same IP subnet as the WRT300N and enter the default IP address of the device into a web browser on the computer. Modify the TCP/IP properties of the computer that is connected to the WRT300N so that the computer and the WRT300N exist on the same network. Then reboot the computer to establish a connection.

16

Which statement accurately describes routing between VLANs when the default gateway addresses of the VLANs are applied to physical interfaces. There is no bandwidth contention on the router interface. This solution will be less expensive than if subinterfaces are used. Trunking will be established between the router and switch ports. Only one physical router interface will be required for multiple VLANs.

17

Refer to the exhibit. After the listed commands are entered into router R1 and switch S1, PC1 and PC2 cannot ping each other. The network administrator enters the show interfaces trunk command and gets the results that are shown. What is the likely problem? The router has not been configured with a routing protocol. The trunk is established, but no VLANs have been configured to use it. The trunk has not been established because the switch port has not been configured for trunking. The switch, the router, or both must be configured with the dynamic desirable option for the Dynamic Trunking Protocol to establish a trunk.

18

Refer to the exhibit. Switch SW2 has been newly purchased and added to the network. What configuration should be applied to SW2 so that it participates in the same VTP domain as switch SW1, receives VLAN information from SW1, and synchronizes VLAN information? Disable VTP pruning on SW2. Configure SW2 in VTP transparent mode. Configure SW2 with the VTP domain password. Configure SW2 as a VTP server with a higher revision number.

19	Refer to the exhibit. What is the purpose of the configuration commands that are shown? to activate port Fa0/10 to make the port a member of VLAN 30 to activate port security on port Fa0/10 to add VLAN 30 to the trunk that is connected to port Fa0/10

20

Refer to the exhibit. A network administrator needs to download a previously saved configuration file from the TFTP server to Switch1. Which command will accomplish this task? Switch1# copy tftp://192.168.0.253/backup-confg nvram:startup-config Switch1# copy tftp://192.168.0.254/backup-confg nvram:startup-config Switch1# copy nvram:startup-config tftp://192.168.0.253/backup-config Switch1# copy nvram:startup-config tftp://192.168.0.254/backup-config

21	Which layers should support QoS in a hierarchical network? only the access layer only the distribution and core layers only the access and distribution layers the access, distribution, and core layers

22

Refer to the exhibit. A company has acquired a new office in a campus environment. Switches in the existing office and the new office are directly connected by a trunk link. The VLANs and IP addressing are setup as shown in the exhibit. The computers in each office are not able to ping each other. What will fix the problem? Use an access link between S2 and S3. Connect S2 and S3 to a common router. Set the subnet mask in the new office to /24. Configure the new office default gateway to 172.17.10.1 Change the port assignments in the new office to a different VLAN.

23	In the implementation of PVST+ in a specific VLAN where all switches have default spanning tree priorities, which spanning-tree command setting could be assigned to force one of the Catalyst switches to become and remain the root bridge? root primary priority 8192 priority 2048 spanning-tree mode rapid pvst

24

A network technician notes that ports Fa0/9 through Fa0/12 on a switch have been assigned to VLAN 40. VLAN 40, however, was improperly named and the technician deletes it. What happens to the ports that were assigned to VLAN 40? All ports will automatically become members of VLAN 1. The ports will automatically become members of the native VLAN. All VLAN 40 member ports will be unable to communicate with any other stations. All ports will remain assigned to VLAN 40 because it cannot be deleted if any ports are currently assigned to it.

25

Refer to the exhibit. What is true of the configuration of switch S1? A Cisco proprietary protocol is in use for ports Fa0/1 and Fa0/3. Switch ports Fa0/1 and Fa0/3 have been configured with the switchport mode access command. Untagged frames received on ports Fa0/1 and Fa0/3 will be placed on VLAN 1. Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.

26	How are data frames identified and sent to the correct VLAN when exiting an Ethernet trunk? Frames are forwarded to the correct VLAN based on the VLAN tag. Frames are always forwarded to the native VLAN when exiting a trunk. Frames are forwarded to the correct VLAN based on the source IP address. Frames are forwarded to the correct VLAN based on information in the MAC address table.

27	Refer to the exhibit. What will allow a host that is connected to switch X in VLAN 10 to communicate with a host that is connected to switch Y in VLAN 10? QoS routing trunking VPN VoIP subinterfaces

28	What provides an authentication mechanism for 802.11-based wireless networks? DSSS OFDM SSID WPA

29

Which statement regarding the service password-encryption command is true? The service password-encryption command is entered at the privileged EXEC mode prompt. The service password-encryption command encrypts only passwords for the console and VTY ports. The service password-encryption command encrypts all previously unencrypted passwords in the running configuration. To see the passwords encrypted by the service password-encryption command, enter the no service password-encryption command.

30	Which STP port type can only appear once on a segment, and must be present in order for traffic to flow on that segment? non-root port disabled port designated port non-designated port

31

Refer to the exhibit. The switches are configured for VTP as shown. Which two statements correctly describe the operation of these switches? (Choose two.) A new VLAN can be added to Switch1 and that information will be added only to Switch2. A new VLAN can be added to Switch1 and that information will be added to Switch2 and Switch4. An existing VLAN can be deleted from Switch4 and that VLAN will be deleted from Switch1 and Switch2. An existing VLAN can be deleted from Switch2 and that VLAN will be deleted from Switch1 and Switch4. A new VLAN can be added to Switch4 and that information will be added to Switch1, Switch2, and Switch3. A new VLAN can be added to Switch3 and that information will be added to Switch1, Switch2, and Switch4.

32	Which statement correctly describes a function of a Layer 2 switch? It routes packets between different LAN segments. It uses the destination MAC address to selectively forward a frame. It performs switching and filtering based on the destination network layer address. It drops a frame whose destination MAC address is not in the MAC address table.

33	Which two statements describe Spanning Tree Protocol? (Choose two.) It is only used at Layer 2. It is configured on routers. It eliminates Layer 2 loops in network topologies. It limits the number of valid MAC addresses allowed on a port. It allows VLAN information to propagate to other switches in the network.

34

Refer to the exhibit. The network administrator configures both switches as displayed. However, host C is unable to ping host D and host E is unable to ping host F. What action should the administrator take to enable this communication? Include a router in the topology. Associate hosts A and B with VLAN 10 instead of VLAN 1. Remove the native VLAN from the trunk. Configure one trunk port in the dynamic desirable mode. Add the switchport nonegotiate command to the configuration of S2.

35

Refer to the exhibit. Switch SW2 was tested in a lab environment and then inserted into a production network without reloading its configuration. After the trunk link between SW1 and SW2 was brought up, all users lost connectivity to the network. What could be the source of the problem? All the VLANs were pruned from the trunk port between SW1 and SW2. SW1 and SW2 cannot be both set as VTP servers in the same VTP domain. VTP configuration revision number of SW2 was higher than the configuration revision number of SW1. The additional VLANs from SW2 created more VLANs than the VLAN database of SW1 could contain.

36

A network administrator enables sticky learning on all access mode interfaces of a Catalyst switch, saves the configuration, then connects hosts to the switch. After the switch operates for several days, the administrator reboots the switch without saving the running configuration. What is the result? All previously learned MAC addresses are lost. The switch reverts to non-sticky dynamic learning. Connected hosts are no longer able to communicate with the switch. Previously learned sticky addresses are retained in the switch configuration.

37	Refer to the exhibit. What is the result of issuing these commands? The enable password will be set. The password will be set for the first Telnet connection. The password will be set for the console connection. The password will be set for the auxiliary connection.

38	Refer to the exhibit. Switch1 is configured for VTP as shown. An administrator connects four switches to Switch1 and configures trunk links between them. Which of the four switches will successfully receive and install VTP updates from Switch1? Option 4

39	A network administrator is implementing a Layer 2 solution for a legacy network that uses a combination of switches. Many of the older devices support only ISL trunking while others support both ISL and 802.1Q trunking. Which STP variant would be best suited for this network? RSTP MSTP PVST PVST+

40	Which type of frame contains information that is used in the election of the spanning tree root bridge? BID LSA LSU BPDU

41	Refer to the exhibit. Why must the NIC of host H1 operate in half-duplex mode? H1 must be able to detect collisions. All other hosts have been configured for half-duplex. The collision detect circuit on Switch1 has been disabled. Port Fa0/1 on Switch1 has been configured for half-duplex.

42	Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean? The router supports encryption and authentication. The router supports both wired and wireless connections. The router supports 802.11b, 802.11g, and 802.11n devices. The router supports connectivity through infrared and radio frequencies.

43	Refer to the exhibit. What will happen when frames with a source address other than 0019.d2e4.d9f7 enters interface Fa0/24? Fa0/24 will become error-disabled. The incoming frames will be dropped. The Fa0/24 port LED will be turned off. The security violation count will be incremented.

44

Refer to the exhibit. The network administrator is planning five additional VLANs to be shared throughout the VTP domain on S3. What action should the administrator take before creating the additional VLANs? Create the VLANs on a switch in VTP server mode and allow them to propogate to the other switches in the domain. Modify the configuration revision to 10 to support the additional VLANs. Enable the VTP pruning mode in order to create the VLANs on S3. Enable the VTP v2 mode.

45

Which statement correctly describes the spanning-tree path cost? It is calculated based on the total number of switches connected in a loop. It is calculated based on the utilization of all the switches along a given path. It is calculated based on the bridge priority of the switches along a given path. It is calculated based on the sum of the port cost value, determined by link speed, for each switch port along a given path.

46

Refer to the exhibit. A wireless infrastructure has been established in a company building as shown. The design goal was to allow roaming between the three APs for handheld devices. However, the devices lose connectivity when the users roam. How can this problem be fixed? Assign different SSIDs to each AP. Reconfigure all APs to the same channel. Use the same BSSID address for each AP. Reposition the APs so that each area of signal strength overlaps the neighbor by at least 10-15%.

47	Refer to the exhibit. Computer A sends a broadcast message. Which devices will see the broadcast? computer B computer B and Router1 computer C and Router1 computer B, computer D, computer E and Router1 computer B, computer C, computer D, computer E and Router1 computer A, computer B, computer C, computer D, computer E and Router1

48

Refer to the exhibit. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. Subsequent attempts to telnet to the switch are not successful. What is causing the problem? The switch must be configured with SSH version 1. The transport input command must specify Telnet access. The RSA keys must be returned to zero before SSH will permit Telnet access. The ip domain-name command must also be entered in line configuration mode for the vty lines.

49	Refer to the exhibit. Switches SW3 and SW4 are brand new switches with default configurations. The links between the switches are configured as trunk links and all VLANs are allowed on the trunks. On the basis of the show running-config output that is provided, which VLANs will be available on SW3 and SW4?  Option2

50	Which device must be installed in each computer to allow a wireless connection to be established? DSL modem wireless NIC wireless router wireless access point

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