Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 111:

  What occurs on a Frame Relay network when the CIR is exceeded?

  A. All TCP traffic is marked discard eligible.
  B. All UDP traffic is marked discard eligible and a BECN is sent.
  C. All TCP traffic is marked discard eligible and a BECN is sent.
  D. All traffic exceeding the CIR is marked discard eligible.
  D. All traffic exceeding the CIR is marked discard eligible.

  ---

  Committed information rate (CIR): The minimum guaranteed data transfer rate agreed to by the Frame Relay switch. Frames that are sent in excess of the CIR are marked as discard eligible (DE) which means they can be dropped if the

  congestion occurs within the Frame Relay network.

  Note: In the Frame Relay frame format, there is a bit called Discard eligible (DE) bit that is used to identify frames that are first to be dropped when the CIR is exceeded.

• Question 112:

  RouterA is unable to reach RouterB. Both routers are running IOS version 12.0.

  

  After reviewing the command output and graphic, what is the most likely cause of the problem?

  A. incorrect bandwidth configuration
  B. incorrect LMI configuration
  C. incorrect map statement
  D. incorrect IP address
  C. incorrect map statement

  ---

  First we have to say this is an unclear question and it is wrong. The "frame-relay map ip" statement is correct thus none of the four answers above is correct. But we guess there is a typo in the output. Maybe the "ip address 172.16.100.2

  255.255.0.0 command should be "ip address 172.16.100.1 255.255.0.0. That makes answer C correct.

• Question 113:

  In a GLBP network, who is responsible for the ARP request?

  A. AVF
  B. AVG
  C. Active Router
  D. Standby Router
  B. AVG

  ---

  Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. The AVG assigns a virtual MAC address

  to each member of the GLBP group. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC

  address.

  The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses.

  Reference: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

• Question 114:

  Which three statements accurately describe Layer 2 Ethernet switches? (Choose three.)

  A. Spanning Tree Protocol allows switches to automatically share VLAN information.
  B. Establishing VLANs increases the number of broadcast domains.
  C. Switches that are configured with VLANs make forwarding decisions based on both Layer 2 and Layer 3 address information.
  D. Microsegmentation decreases the number of collisions on the network.
  E. In a properly functioning network with redundant switched paths, each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.
  F. If a switch receives a frame for an unknown destination, it uses ARP to resolve the address.
  B. Establishing VLANs increases the number of broadcast domains.
  D. Microsegmentation decreases the number of collisions on the network.
  E. In a properly functioning network with redundant switched paths, each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.

  ---

  Microsegmentation is a network design (functionality) where each workstation or device on a network gets its own dedicated segment (collision domain) to the switch. Each network device gets the full bandwidth of the segment and does not

  have to share the segment with other devices. Microsegmentation reduces and can even eliminate collisions because each segment is its own collision domain ->.

  Note: Microsegmentation decreases the number of collisions but it increases the number of collision domains.

• Question 115:

  Refer to the graphic.

  

  A static route to the 10.5.6.0/24 network is to be configured on the HFD router. Which commands will accomplish this? (Choose two.)

  A. HFD(config)# ip route 10.5.6.0 0.0.0.255 fa0/0
  B. HFD(config)# ip route 10.5.6.0 0.0.0.255 10.5.4.6
  C. HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/0
  D. HFD(config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6
  E. HFD(config)# ip route 10.5.4.6 0.0.0.255 10.5.6.0
  F. HFD(config)# ip route 10.5.4.6 255.255.255.0 10.5.6.0
  C. HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/0
  D. HFD(config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6

  ---

  The simple syntax of static route:

  ip route destination-network-address subnet-mask {next-hop-IP-address | exit-interface}

  +

  destination-network-address: destination network address of the remote network

  +

  subnet mask: subnet mask of the destination network

  +

  next-hop-IP-address: the IP address of the receiving interface on the next-hop router

  +

  exit-interface: the local interface of this router where the packets will go out In the statement "ip route 10.5.6.0 255.255.255.0 fa0/0:

  +

  10.5.6.0 255.255.255.0: the destination network +fa0/0: the exit-interface

• Question 116:

  What are three benefits of GLBP? (Choose three.)

  A. GLBP supports up to eight virtual forwarders per GLBP group.
  B. GLBP supports clear text and MD5 password authentication between GLBP group members.
  C. GLBP is an open source standardized protocol that can be used with multiple vendors.
  D. GLBP supports up to 1024 virtual routers.
  E. GLBP can load share traffic across a maximum of four routers.
  F. GLBP elects two AVGs and two standby AVGs for redundancy.
  B. GLBP supports clear text and MD5 password authentication between GLBP group members.
  D. GLBP supports up to 1024 virtual routers.
  E. GLBP can load share traffic across a maximum of four routers.

• Question 117:

  Scenario Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links. You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.

  

  

  

  An OSPF neighbor adjacency is not formed between R3 in the main office and R6 in the Branch3 office. What is causing the problem?

  A. There is an area ID mismatch.
  B. There is a PPP authentication issue; the username is not configured on R3 and R6.
  C. There is an OSPF hello and dead interval mismatch.
  D. The R3 router ID is configured on R6.
  D. The R3 router ID is configured on R6.

  ---

  Using the show running-config command we see that R6 has been incorrectly configured with the same router ID as R3 under the router OSPF process.

  

• Question 118:

  Scenario

  Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.

  The EIGRP routing protocol is configured.

  You are required to troubleshoot and resolve the EIGRP issues between the various routers.

  Use the appropriate show commands to troubleshoot the issues.

  

  

  

  The loopback interfaces on R4 with the IP addresses of 10.4.4.4/32, 10.4.4.5/32, and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?

  A. The interfaces are shutdown, so they are not being advertised.
  B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
  C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
  D. The loopback addresses haven't been advertised, and the network command is missing on R4.
  B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.

  ---

  For an EIGRP neighbor to form, the following must match:

  -Neighbors must be in the same subnet

  -K values

  -AS numbers

  -Authentication method and key strings

  Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.

  

• Question 119:

  Scenario

  Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.

  The EIGRP routing protocol is configured.

  You are required to troubleshoot and resolve the EIGRP issues between the various routers.

  Use the appropriate show commands to troubleshoot the issues.

  

  

  

  

  Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?

  A. The K values mismatch.
  B. The AS does not match.
  C. The network command is missing.
  D. The passive interface command is enabled.
  C. The network command is missing.

  ---

  The link from R1 to R6 is shown below:

  

  As you can see, they are both using e0/0. The IP addresses are in the 192.168.16.0 network:

  

  But when we look at the EIGRP configuration, the "network 192.168.16.0" command is missing on R6.

  

• Question 120:

  What levels will be trapped if the administrator executes the command router(config)# logging trap 4 (Choose four)

  A. Emergency
  B. Notice
  C. Alert
  D. Error
  E. Warning
  A. Emergency
  C. Alert
  D. Error
  E. Warning

  ---

  The Message Logging is divided into 8 levels as listed below:

  Level Keyword Description 0 emergencies System is unusable 1 alerts Immediate action is needed 2 critical Critical conditions exist 3 errors Error conditions exist 4 warnings Warning conditions exist 5 notification Normal, but significant, conditions exist 6 informational Informational messages 7 debugging Debugging messages

  If you specify a level with the "logging trap level" command, that level and all the higher levels will be logged. For example, by using the "logging trap 4 command, all the logging of emergencies, alerts, critical, errors, warnings will be logged.