Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 151:

  Which statement describes VRRP object tracking?

  A. It monitors traffic flow and link utilization.
  B. It ensures the best VRRP router is the virtual router master for the group.
  C. It causes traffic to dynamically move to higher bandwidth links.
  D. It thwarts man-in-the-middle attacks.
  B. It ensures the best VRRP router is the virtual router master for the group.

  ---

  Object tracking is the process of tracking the state of a configured object and uses that state to determine the priority of the VRRP router in a VRRP group.

• Question 152:

  Which protocol is an open standard protocol framework that is commonly used in VPNs, to provide secure end-to-end communications?

  A. RSA
  B. L2TP
  C. IPsec
  D. PPTP
  C. IPsec

  ---

  IPSec is a framework of open standards that provides data confidentiality, data integrity, and data authentication between participating peers at the IP layer. IPSec can be used to protect one or more data flows between IPSec peers.

• Question 153:

  Which three elements must be used when you configure a router interface for VLAN trunking? (Choose three.)

  A. one physical interface for each subinterface
  B. one IP network or subnetwork for each subinterface
  C. a management domain for each subinterface
  D. subinterface encapsulation identifiers that match VLAN tags
  E. one subinterface per VLAN
  F. subinterface numbering that matches VLAN tags
  B. one IP network or subnetwork for each subinterface
  D. subinterface encapsulation identifiers that match VLAN tags
  E. one subinterface per VLAN

  ---

  This scenario is commonly called a router on a stick. A short, well written article on this operation can be found here: http://www.thebryantadvantage.com/RouterOnAStickCCNACertificationExamTutorial.htm

• Question 154:

  What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two.)

  A. hello packets
  B. SAP messages sent by other routers
  C. LSAs from other routers
  D. beacons received on point-to-point links
  E. routing tables received from other link-state routers
  F. TTL packets from designated routers
  A. hello packets
  C. LSAs from other routers

  ---

  Neighbor discovery is the first step in getting a link state environment up and running. In keeping with the friendly neighbor terminology, a Hello protocol is used for this step. The protocol will define a Hello packet format and a procedure for

  exchanging the packets and processing the information the packets contain.

  After the adjacencies are established, the routers may begin sending out LSAs. As the term flooding implies, the advertisements are sent to every neighbor. In turn, each received LSA is copied and forwarded to every neighbor except the one

  that sent the LSA.

• Question 155:

  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.

  

  

  

  R1 does not form an OSPF neighbor adjacency with R2. Which option would fix the issue?

  A. R1 ethernet0/1 is shutdown. Configure no shutdown command.
  B. R1 ethernet0/1 configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25.
  C. R2 ethernet0/1 and R3 ethernet0/0 are configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25.
  D. Enable OSPF for R1 ethernet0/1; configure ip ospf 1 area 0 command under ethernet0/1.
  B. R1 ethernet0/1 configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25.

  ---

  Looking at the configuration of R1, we see that R1 is configured with a hello interval of 25 on interface Ethernet 0/1 while R2 is left with the default of 10 (not configured).

  

• Question 156:

  Refer to the topology shown in the exhibit.

  

  Which three ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three.)

  A. Switch A - Fa0/0
  B. Switch A - Fa0/1
  C. Switch B - Fa0/0
  D. Switch B - Fa0/1
  E. Switch C - Fa0/0
  F. Switch C - Fa0/1
  B. Switch A - Fa0/1
  C. Switch B - Fa0/0
  D. Switch B - Fa0/1

  ---

  This question is to check the spanning tree election problem.

  1.

  First, select the root bridge, which can be accomplished by comparing the bridge ID, the smallest will be selected. Bridge-id= bridge priority + MAC address. The three switches in the figure all have the default priority, so we should compare the MAC address, it is easy to find that SwitchB is the root bridge.

  2.

  Select the root port on the non-root bridge, which can be completed through comparing root path cost. The smallest will be selected as the root port.

  3.

  Next, select the Designated Port. First, compare the path cost, if the costs happen to be the same, then compare the BID, still the smallest will be selected. Each link has a DP. Based on the exhibit above, we can find DP on each link. The DP on the link between SwitchA and SwitchC is SwitchA'Fa0/1, because it has the smallest MAC address.

• Question 157:

  An administrator is trying to ping and telnet from SwitchC to RouterC with the results shown below.

  

  Click the console connected to RouterC and issue the appropriate commands to answer the questions.

  

  

  What would be the effect of issuing the command ip access-group 114 in to the fa0/0 interface?

  A. Attempts to telnet to the router would fail.
  B. It would allow all traffic from the 10.4.4.0 network.
  C. IP traffic would be passed through the interface but TCP and UDP traffic would not.
  D. Routing protocol updates for the 10.4.4.0 network would not be accepted from the fa0/0 interface.
  B. It would allow all traffic from the 10.4.4.0 network.

  ---

  From the output of access-list 114: access-list 114 permit ip 10.4.4.0 0.0.0.255 any we can easily understand that this access list allows all traffic (ip) from 10.4.4.0/24 network

• Question 158:

  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 R4 in the Branch1 office. What is causing the problem?

  A. There is an area ID mismatch.
  B. There is a Layer 2 issue; an encapsulation mismatch on serial links.
  C. There is an OSPF hello and dead interval mismatch.
  D. The R3 router ID is configured on R4.
  A. There is an area ID mismatch.

  ---

  A show running-config command on R3 and R4 shows that R4 is incorrectly configured for area 2:

  

• Question 159:

  Which three commands can you use to set a router boot image? (Choose three.)

  A. Router(config)# boot system flash c4500-p-mz.121-20.bin
  B. Router(config)# boot system tftp c7300-js-mz.122-33.SB8a.bin
  C. Router(config)#boot system rom c7301-advipservicesk9-mz.124-24.T4.bin
  D. Router> boot flash:c180x-adventerprisek9-mz-124-6T.bin
  E. Router(config)#boot flash:c180x-adventerprisek9-mz-124-6T.bin
  F. Router(config)#boot bootldr bootflash:c4500-jk9s-mz.122-23f.bin
  A. Router(config)# boot system flash c4500-p-mz.121-20.bin
  B. Router(config)# boot system tftp c7300-js-mz.122-33.SB8a.bin
  C. Router(config)#boot system rom c7301-advipservicesk9-mz.124-24.T4.bin

• Question 160:

  What is the alternative notation for the IPv6 address B514:82C3:0000:0000:0029:EC7A:0000:EC72?

  A. B514 : 82C3 : 0029 : EC7A : EC72
  B. B514 : 82C3 :: 0029 : EC7A : EC72
  C. B514 : 82C3 : 0029 :: EC7A : 0000 : EC72
  D. B514 : 82C3 :: 0029 : EC7A : 0 : EC72
  D. B514 : 82C3 :: 0029 : EC7A : 0 : EC72

  ---

  There are two ways that an IPv6 address can be additionally compressed: compressing leading zeros and substituting a group of consecutive zeros with a single double colon (::). Both of these can be used in any number of combinations to notate the same address. It is important to note that the double colon (::) can only be used once within a single IPv6 address notation. So, the extra 0's can only be compressed once.