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CCNA 3 Final Exam Answers 2012

Posted by Nurul Gayatri Archuleta on 8:31 AM Labels: CCNA
1. A wireless client is attempting to establish a connection with a wireless access point. What process does the client use to discover the access points which are available to it? probing beaconing association authentication

2.

Refer to the exhibit. Each switch is shown with its MAC address. Which switch will be elected as the spanning-tree root bridge if the switches are configured with their default priority values? switch A switch B switch C switch D switch E switch F

3.

Refer to the exhibit. Which two switch interfaces would be RSTP edge ports? (Choose two.) switch S1, Fa0/1 switch S3, Fa0/5 switch S4, Fa0/1 switch S2, Fa0/3 switch S4, Fa0/2 switch S3, Fa0/2

4. What is a function or characteristic of the native VLAN? It is the VLAN that supports untagged traffic on an 802.1Q trunk. It is always assigned to VLAN 1 for backward compatibility. It is always the same VLAN number for all trunks within an organization. It is used as the management VLAN throughout the entire switched network.

5. A network administrator must purchase new access layer switches to deploy across an existing hierarchical network that supports voice and data traffic. At a minimum, which two features should the new access layer switches support? (Choose two.)

A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing. shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. A test of the network. No routing protocol is configured on Router1. What is the most likely cause of this problem? Switch port Fa0/1 is not trunking.PoE QoS modular design Layer 3 support line speed forwarding rates 6. . Router interface Fa0/0 is possibly down. Refer to the exhibit. however. Which combination is required to establish a connection to initially configure the Linksys WRT300N wireless access device? a computer with a console connection to the WRT300N a computer with a wireless connection to the WRT300N a computer with an AUX port connection to the WRT300N a computer configured in the same IP subnet as the WRT300N and a direct cable connection to it 7.

9. Only the the management and native VLANs will be allowed across the trunk. Refer to the exhibit. Only VLANs that are configured on the VTP server in the domain will be allowed across the trunk.One of the router subinterfaces is possibly down. Which VLANs will be allowed across the trunk? Only VLAN 1 will be allowed across the trunk. All configured VLANs will be allowed across the trunk. Only the native VLAN will be allowed across the trunk. . 8. SW-T has been configured with a single trunking interface.

Hosts B and C attempt to transmit a frame at the same time. but a collision occurs. B.Refer to the exhibit. and F only hosts D. D. . C. E. B. Which hosts will receive the collision jamming signal? all hosts that are shown only hosts B and C only hosts A. and D only hosts A. and F 10. E. and C only hosts A.

R1 can ping computer 3 but cannot ping computer 1. . 11. Configure a default gateway on the switch. Router interface Fa0/0 has the wrong trunk encapsulation type configured. 12. The switch VTY lines have been properly configured. The IP address of computer 1 is in the wrong logical network. Refer to the exhibit. but PC1 is unable to remotely manage the switch. What is a possible cause for this failure? S1 port Fa0/11 is in the wrong VLAN. R1 is configured for traditional inter-VLAN routing. Configure the native VLAN on the switch. R1 does not have an active routing protocol.Refer to the exhibit. How can this problem be resolved? Configure the Fa0/1 interface of the switch in trunk mode. Configure the Fa0/1 interface of the switch to allow all VLANs.

the host checks to determine if the line is idle before transmitting. Refer to the exhibit.) After the end of the jam signal. . 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. a backoff algorithm is invoked. The hub will block the port connected to Host 4 to prevent a collision.Refer to the exhibit. Hosts 1 and 4 are assigned shorter backoff values to provide them priority to access the media. How do the hosts respond on the network? (Choose two. 13. All hosts are in listen mode. Host 1 and Host 4 both transmit data at the same time. The network administrator is planning five additional VLANs to be shared throughout the VTP domain on S3. Modify the configuration revision to 10 to support the additional VLANs. Hosts 1 and 4 are operating full duplex so no collision will exist. If a host has data to transmit after the backoff period of that host.

What will commonly cause this problem? The PC is set to full duplex. Which two settings show the default value of VTP configuration on a Cisco 2960 switch? (Choose two. The PC has a ping success rate to the default gateway of less than half the ping attempts. Enable the VTP v2 mode. The switch port fails to autonegotiate the duplex setting and defaults to half duplex. Other PCs on the switch can consistently ping the default gateway. The PC and the default gateway have different bandwidth Ethernet ports. Refer to the exhibit.Enable the VTP pruning mode in order to create the VLANs on S3. The switch traffic is exceeding available frame buffers.) revision number existing VLANs operating mode domain name pruning mode 15. The switch port is configured for auto duplex and the PC is configured for full duplex. 14. . An administrator is troubleshooting a PC on the network which is suffering from slow and intermittent connectivity. which causes a duplex mismatch. The result is that frames are being dropped.

The default gateway is not on the same switch that the PC is.cd23. 16. When forwarding a frame to the device with address 0060. What does the term DYNAMIC indicate in the output that is shown? This entry can only be removed from the MAC address table by a network administrator. Only the device with MAC address 0060. the switch does not have to perform a lookup to determine the final destination port.cd23 will be allowed to connect to port Fa0/18. The switch learned this MAC address from the source address in a frame received on Fa0/18. Which wireless topology supports roaming from one access point to another? ESS BSS IBSS ad hoc . Refer to the exhibit.5c5b. Which switching method provides error-free data transmission? fragment-free fast-forward integrity-checking store-and-forward 18.5c5b. 17.

Enable pruning for VLAN10 on the VTP server. Refer to the exhibit. Which value determines if a switch becomes the central point of reference in the spanning tree topology? lowest bridge ID highest revision number lowest numeric IP address highest numeric MAC address 20. 21. The broadcast traffic from PC1 is consuming bandwidth on the interswitch trunks.19. Move PC1 to a port on SW2. Associate PC1 as a member of a new VLAN. . Move PC2 to a port on SW3. What should be done to prevent this from happening? Move PC1 to a port on SW3.

A wireless access point is configured for WPA2. An error message is displayed. Which encryption algorithm will all devices that connect to the access point be required to use? AES PPK PSK TKIP WEP 23. FastEthernet port 0/5 will show an err-disabled message. The port is shut down.ba27 reaches switch port 0/5? The frame is dropped. What happens when a frame from a source MAC address different from 00a8. Where is the information of newly created VLANs stored on a switch? CPU flash NVRAM RAM 24. .Refer to the exhibit.d2e4. 22.

1.Refer to the exhibit. Refer to the exhibit.1.33 /28 192.168. The RSA keys must be returned to zero before SSH will permit Telnet access. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. A new host needs to be connected to VLAN 1. The ip domain-name command must also be entered in line configuration mode for the vty lines.168.168. 25.1.1.55 /28 26. . What is causing the problem? The switch must be configured with SSH version 1.22 /28 192. The transport input command must specify Telnet access.1.11 /28 192.168.44 /28 192. Subsequent attempts to telnet to the switch are not successful.168. Which IP address should be assigned to this new host? 192.

. Which STP port type can only appear once on a segment. A new switch. has been added to the network. The network administrator determines that VLAN information is not propagating to SW3. There are fewer non-overlapping channels available to help reduce RF interference. The OFDM modulation technique results in a slower data rate. What is one disadvantage that 802.Refer to the exhibit. SW3.11a wireless has compared to 802.11g? Use of the 5GHz band requires much larger antennas. Which command will remedy the problem? SW1(config)# vtp version 1 SW2(config)# vtp mode client SW3(config)# vtp domain Cisco1 SW3(config)# vtp mode transparent 27. and must be present in order for traffic to flow on that segment? non-root port disabled port designated port non-designated port 28.

It restricts broadcast packets to a single VLAN. What is the purpose of VLAN trunking? It improves network performance by reducing broadcast traffic. It selects the best path to transmit data in a switched network. What is the purpose of the Spanning Tree algorithm? It propagates VLAN configurations to other switches. 29. It carries the traffic of multiple VLANs through a single link. APs are more susceptible to DoS attacks. MAC addresses are easily spoofed.The use of higher frequencies means that signals are more likely to be obstructed. It avoids spanning tree loops in a switched network. What are two benefits of a hierarchical network model over a flat network design? (Choose two. It segments a network into multiple broadcast domains. The payload encryption is easily broken.) reduced cost of equipment increased network availability elimination of equipment downtime reduced size of the physical network layout simplification of management and troubleshooting elimination of the need for Layer 3 functionality 32. Why is MAC address filtering considered a poor choice in securing a WLAN? Available bandwidth is reduced. . 31. It prevents loops in a switched network with redundant paths. 30.

) Broadcasts are natively blocked by the switch.) traffic that is assigned to the default VLAN traffic that is assigned to the native VLAN traffic from the voice VLAN on an IP phone Telnet. The source MAC address within a frame is used by the switch to associate a port with that MAC address. Increase the distance between the clients. 34. Subnetting is used by the switch to segment local networks. or SSH traffic for switch management traffic that is leaving an access mode port that is connected to another switch 35. Data packets are forwarded by the switch from one port to another based on the destination IP address within the packet. . HTTP. Users A and B are reporting intermittent connectivity problems.33. Frames that contain an unknown destination MAC address are dropped by the switch. What will fix the problem? Relocate the APs closer to each other. Preinstallation surveys showed strong signal strength from the AP locations to the client locations. Frames are directed by the switch from one port to another based on the destination MAC address within the frame. Which two statements describe the operation of an access layer Ethernet switch? (Choose two. Outside electrical interference has been eliminated. Refer to the exhibit. Which two types of traffic are always transmitted as untagged frames? (Choose two.

It drops a frame whose destination MAC address is not in the MAC address table. How can the convergence time be reduced? Increase the capacity of the distribution and core trunk links to 10 Gb/s. Refer to the exhibit. Implement Rapid Spanning Tree Protocol.Change the channel on AP-B to 6 or 11. 37. Add a trunk link that directly connects D1 and D2. the network takes nearly a minute to completely converge. All inter-switch links that are shown are trunks. . Use Layer 3 switching on the core switch. It performs switching and filtering based on the destination network layer address. Whenever an inter-switch link fails. Place AP-A and AP-B on the same wireless channel. Which statement correctly describes a function of a Layer 2 switch? It routes packets between different LAN segments. 36. It uses the destination MAC address to selectively forward a frame. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol.

39. . Refer to the exhibit.38. Apply IP addresses that are in the same subnet to FastEthernet 0/1 on SW1 and FastEthernet 0/2 on SW2. What should be done to fix the problem? Introduce a Layer 3 device in the topology. Reconfigure the fa0/1 interface on switch SW1 with a static trunk configuration. Configure both switches in VTP transparent mode to allow them to share VLAN information. Hosts that are connected to switch SW1 are not able to communicate with hosts in the same VLAN that are connected to switch SW2.

Both switches are interconnected via a trunk link. Host A and host B are on the default VLAN but are not able to exchange traffic. .Refer to the exhibit. Configure the same native VLAN on both ends of the trunk. Remove the native VLAN from the trunk. What should be done to fix the problem? Allow all VLANs on the trunk link. Include a router or switch with Layer 3 capabilities. 40.

Refer to the exhibit. Refer to the exhibit.2. Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.) Incoming traffic with VLAN ID 0 is processed by interface fa0/0. What is the maximum number of VLANs that can be deleted from the Switch as it is configured? zero four five eight nine 41. . Which two statements are true about the operation of the interfaces? (Choose two.

Assign a port priority of 128 for all ports on the switch. Change the VTP mode to server. . Traffic inbound on this router is processed by different subinterfaces. Configure a loopback interface with the highest IP address. even if fa0/0 line protocol is down. Subinterfaces use unique MAC addresses by adding the 802. 42. Which set of commands will accomplish this task? 44. What can an administrator do to ensure that a specific switch will win a root election if all switches are set to their default configurations? Set the bridge priority to 16384. depending on the VLAN from which the traffic originated.1q trunking on switch ports Fa0/5 through Fa0/10.Both subinterfaces remain up with line protocol up. A network technician is attempting to configure 802.1Q VLAN ID to the hardware address. What is the benefit of the auto-MDIX feature on a Cisco Catalyst switch? dynamically assigns a new management VLAN ID autonegotiates IP address information for initial management connections allows the use of straight-through patch cables regardless of connected device types places a port immediately in the forwarding state to reduce the time for the spanning tree to reconverge 43.

Which Cisco switch feature is used to limit the number of valid MAC addresses that a switch associates with a switchport? VLANs PortFast port security VTP pruning DHCP snooping .16. SSH encrypts only the username and password when logging in. The running configuration file on S1 will be saved via TFTP to a file named tokyo-config.2. What will be the effect of the command S1# copy system:running-config tftp://172. What is the purpose of the switch command switchport access vlan 99? to enable port security to make the port operational to assign the port to a particular VLAN to designate the VLAN that does not get tagged to assign the port to the native VLAN (VLAN 99) 48. The contents of NVRAM on S1 will become the startup configuration file on the tokyo switch.155/tokyo-config? The IOS will be copied to the TFTP server.45. Why is it advisable that a network administrator use SSH instead of Telnet when managing switches? SSH uses TCP whereas Telnet does not. The configuration file named tokyo-config will overwrite the startup configuration file on S1. 47. SSH sends a clear text message steam which reduces the bandwidth use for management. 46. SSH encrypts all remote management communications whereas Telnet does not.

Transparent mode switches can adopt VLAN management changes that are received from other switches. VLAN 20 and VLAN 30 are not allowed on the trunk between the switches. The Fa0/11 interface of Switch1 is not configured as a trunk. However. Which two statements describe VTP transparent mode operation? (Choose two. 50. hosts B and D cannot ping each other. The devices in the network are operational and configured as indicated in the exhibit.) Transparent mode switches can create VLAN management information. What is the most likely cause of this problem? The link between the switches is up but not trunked. Hosts B and D are configured with IP addresses from different subnets. .49. Transparent mode switches pass any VLAN management information that they receive to other switches. Refer to the exhibit. Transparent mode switches can add VLANs of local significance only.

) Reset the VTP counters. The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Configure the VTP mode of the switch to transparent. Configure VTP version 1 on the switch. Verify that the switch has a higher configuration revision number. 51. Which two steps should the administrator perform to achieve this? (Choose two. . Which switch port type assumes a discarding state on non-root switches? root port edge port alternate port designated port 52. RSTP is enabled in a switched network that is active and converged.Transparent mode switches originate updates about the status of their VLANS and inform other switches about that status. Configure the switch with the same VTP domain name as other switches in the network.