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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.)

shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. A test of the network. 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. What is the most likely cause of this problem? Switch port Fa0/1 is not trunking. Router interface Fa0/0 is possibly down. . however. A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing.PoE QoS modular design Layer 3 support line speed forwarding rates 6. Refer to the exhibit. No routing protocol is configured on Router1.

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

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. Hosts B and C attempt to transmit a frame at the same time. and F only hosts D. B. and F 10. C. and C only hosts A. B. D. E.Refer to the exhibit. and D only hosts A. . E.

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

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

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

cd23 will be allowed to connect to port Fa0/18. Which switching method provides error-free data transmission? fragment-free fast-forward integrity-checking store-and-forward 18. Only the device with MAC address 0060. the switch does not have to perform a lookup to determine the final destination port. Refer to the exhibit.The default gateway is not on the same switch that the PC is. 17. 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.5c5b. The switch learned this MAC address from the source address in a frame received on Fa0/18. When forwarding a frame to the device with address 0060.cd23. Which wireless topology supports roaming from one access point to another? ESS BSS IBSS ad hoc . 16.5c5b.

Move PC2 to a port on SW3. 21. Enable pruning for VLAN10 on the VTP server. . What should be done to prevent this from happening? Move PC1 to a port on SW3. Move PC1 to a port on SW2. 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. The broadcast traffic from PC1 is consuming bandwidth on the interswitch trunks. Associate PC1 as a member of a new VLAN.19.

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. Which encryption algorithm will all devices that connect to the access point be required to use? AES PPK PSK TKIP WEP 23. An error message is displayed. 22. A wireless access point is configured for WPA2.ba27 reaches switch port 0/5? The frame is dropped. FastEthernet port 0/5 will show an err-disabled message.Refer to the exhibit. .d2e4. The port is shut down.

168.1.168.1. The ip domain-name command must also be entered in line configuration mode for the vty lines.1. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. What is causing the problem? The switch must be configured with SSH version 1.1.Refer to the exhibit. Which IP address should be assigned to this new host? 192.168. .33 /28 192. Subsequent attempts to telnet to the switch are not successful.168.1.168. The RSA keys must be returned to zero before SSH will permit Telnet access.44 /28 192. 25.55 /28 26.11 /28 192. The transport input command must specify Telnet access.22 /28 192. Refer to the exhibit. A new host needs to be connected to VLAN 1.

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

Why is MAC address filtering considered a poor choice in securing a WLAN? Available bandwidth is reduced. It carries the traffic of multiple VLANs through a single link. MAC addresses are easily spoofed. It restricts broadcast packets to a single VLAN. 29. It avoids spanning tree loops in a switched network. It segments a network into multiple broadcast domains. It prevents loops in a switched network with redundant paths. What are two benefits of a hierarchical network model over a flat network design? (Choose two. .) 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. The payload encryption is easily broken. What is the purpose of the Spanning Tree algorithm? It propagates VLAN configurations to other switches. 31. 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. APs are more susceptible to DoS attacks.The use of higher frequencies means that signals are more likely to be obstructed. 30.

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

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

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

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

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

Both subinterfaces remain up with line protocol up. even if fa0/0 line protocol is down. Change the VTP mode to server. 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. Configure a loopback interface with the highest IP address.1q trunking on switch ports Fa0/5 through Fa0/10. Traffic inbound on this router is processed by different subinterfaces. Subinterfaces use unique MAC addresses by adding the 802. Which set of commands will accomplish this task? 44. A network technician is attempting to configure 802. depending on the VLAN from which the traffic originated. 42. . Assign a port priority of 128 for all ports on the switch.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.

What will be the effect of the command S1# copy system:running-config tftp://172.2. SSH encrypts all remote management communications whereas Telnet does not. The contents of NVRAM on S1 will become the startup configuration file on the tokyo switch.45.155/tokyo-config? The IOS will be copied to the TFTP server. 47. Why is it advisable that a network administrator use SSH instead of Telnet when managing switches? SSH uses TCP whereas Telnet does not. 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. 46. SSH encrypts only the username and password when logging in. The configuration file named tokyo-config will overwrite the startup configuration file on S1. The running configuration file on S1 will be saved via TFTP to a file named tokyo-config. 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 sends a clear text message steam which reduces the bandwidth use for management.

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

Transparent mode switches originate updates about the status of their VLANS and inform other switches about that status. RSTP is enabled in a switched network that is active and converged. Configure the switch with the same VTP domain name as other switches in the network. Configure VTP version 1 on the switch. 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.) Reset the VTP counters. 51. Which switch port type assumes a discarding state on non-root switches? root port edge port alternate port designated port 52. Which two steps should the administrator perform to achieve this? (Choose two. Verify that the switch has a higher configuration revision number.