Cisco 642-902 Online Practice Questions and Exam Preparation

Cisco 642-902 Online Questions & Answers

• Question 361:

  Refer to the exhibit. ROUTE.com is planning to implement a new secure OSPF network to support traffic between clients on the 172.16.10.0/24 network and the file server on the 172.16.20./24 network. You have been asked to review the implementation plan for the OSPF project. Which statement about the plan is true?

  

  A. It is complete as written.
  B. It should include a task that shuts down all unused interfaces.
  C. It should include tasks that enable and verify OSPF authentication.
  D. It should include a task that establishes a file transfer baseline before and after the configuration is changed.
  C. It should include tasks that enable and verify OSPF authentication.

  ---

  The complete implementation plan should be

  1.

  Enable OSPF process 1 on all routers

  2.

  Enable area 0 on R2, R3 and R4

  3.

  Enable area 10 on R1, R2 and R3

  4.

  Enable area 20 on R4 and R5

  5.

  Enable and verify OSPF authentication

  6.

  Verify that all routers contain a complete routing table

  7.

  Verify that the clients can successfully access the server

  8.

  Document configuration changes

• Question 362:

  Which two statements about route redistribution when implementing OSPF are true? (Choose two.)

  A. Routes learned using any IP routing protocol can only be redistributed into non IP routing protocols.
  B. OSPF can import routes learned using EIGRP, RIP, and IS-IS.
  C. OSPF routes cannot be exported into EIGRP, RIP, and IS-IS.
  D. At the interdomain level, OSPF cannot import routes learned using BGP.
  E. OSPF routes can be exported into BGP.
  B. OSPF can import routes learned using EIGRP, RIP, and IS-IS.
  E. OSPF routes can be exported into BGP.

  ---

  Reference:

  http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_5 5_se/configuration/guide/swiprout.html (See configuring OSPF)

• Question 363:

  Refer to exhibit.

  

  The exhibit shows the R1 topology table to reach 192.168.1.0/24 network. Which route(s) will be installed in routing table of R1 to reach network 192.168.1.0/24 after configuring R1 with the following command? Router(config-router)# variance 2

  A. R2 only
  B. R2 and R3
  C. R2 and R4
  D. R2, R3 and R4
  A. R2 only

  ---

  Every routing protocol supports equal cost path load balancing. In addition, Interior Gateway Routing Protocol (IGRP) and EIGRP also support unequal cost path load balancing. Use the variance n command in order to instruct the router to include routes with a metric of less than n times the minimum metric route for that destination. The variable n can take a value between 1 and 128. The default is 1, which means equal cost load balancing. Traffic is also distributed among the links with unequal costs, proportionately, with respect to the metric.

• Question 364:

  Refer to the output.

  

  What IOS command produces this output? Select the best response

  A. show ip ospf
  B. show ip ospf interface
  C. show ipv6 ospf interface
  D. show ipv6 ospf
  D. show ipv6 ospf

  ---

  Reference: http://www.cisco.com/en/US/docs/ios/ipv6/command/reference/ipv6_15.html#wp2439467

• Question 365:

  Which configuration command is used to enable EIGRP unequal-cost path load balancing?

  A. maximum-paths
  B. distance
  C. metric
  D. variance
  E. default-metric
  D. variance

  ---

  Reference:

  http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009437d.shtml (See traffic sharing http://networkninja.co.za/page/2/?s=bothaandcat=plus-5-results

• Question 366:

  Company has migrated to IPv6 in their network. Which three IPv6 notations represent the same address? (Select three)

  A. 2031::130F::9C0:876A:130B
  B. 2031:0000:130F:0000:0000:09C0:876A:130B
  C. 2031:0:130F:::9C0:876A:130B
  D. 2031::130F:0::9C0:876A:130B
  E. 2031:0:130F:0:0:09C0:876A:130B
  F. 2031:0:130F::9C0:876A:130B
  B. 2031:0000:130F:0000:0000:09C0:876A:130B
  E. 2031:0:130F:0:0:09C0:876A:130B
  F. 2031:0:130F::9C0:876A:130B

  ---

  With IP version 6, octets containing all zero's can be simply represented as :, while consecutive zero fields can be represented as ::. ANSWER choices C and E are simply the shorthand version of the fully written IPv6 address shown in choice.

• Question 367:

  Which statement describes the difference between a manually configured IPv6 in IPv4 tunnel versus an automatic 6to4 tunnel?

  A. A manually configured IPv6 in IPv4 tunnel allows multiple IPv4 destinations.
  B. An automatic 6to4 tunnel allows multiple IPv4 destinations.
  C. A manually configured IPv6 in IPv4 tunnel does not require dual-stack (IPv4 and IPv6) routers at the tunnel endpoints.
  D. An automatic 6to4 tunnel does not require dual-stack (IPv4 and IPv6) routers at the tunnel endpoints.
  B. An automatic 6to4 tunnel allows multiple IPv4 destinations.

  ---

  An automatic 6to4 tunnel allows isolated IPv6 domains to be connected over an IPv4 network to remote IPv6 networks. The key difference between automatic 6to4 tunnels and manually configured tunnels is that the tunnel is not point-topoint; it is point-to-multipoint -> it allows multiple IPv4 destinations .

  Manually 6to4 is point-to-point -> only allows one IPv4 destination.

  Configuring 6to4 (manually and automatic) requires dual-stack routers (which supports both IPv4 and IPv6) at the tunnel endpoints because they are border routers between IPv4 and IPv6 networks.

  (Reference: http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6tunnel_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1055515)

• Question 368:

  When configuring EIGRP to run across a 56 Kbps serial PPP link, what command do you need to put under the serial interface ensure proper convergence of EIGRP routes?

  A. bandwidth 56
  B. bandwidth 56000
  C. ip bandwidth-percent eigrp 1 56
  D. ip bandwidth-percent eigrp 1 56000
  A. bandwidth 56

  ---

  When configuring serial links using EIGRP it is important to configure the bandwidth setting on the interface. If the bandwidth setting is not changed for these interfaces EIGRP assumes the default bandwidth on the link instead of the true bandwidth. If the link is slower, the router may not be able to converge, routing updates might become lost, or suboptimal path selection may result. Router(config-if)#bandwidth kilobits The value, kilobits, indicates the intended bandwidth in kilobits per second. For generic serial interfaces, such as PPP or HDLC, set the bandwidth to the line speed.

• Question 369:

  What is the purpose of the eigrp stub configuration command?

  A. to increase scalability by limiting the EIGRP query range
  B. to reduce the size of the routing table by blocking the D EX (External EIGRP) routes into the EIGRP stub router
  C. to reduce the convergence time by enabling the EIGRP stub router to propagate the EIGRP queries from the EIGRP hub router
  D. to reduce the convergence time by enabling the EIGRP stub router to also perform query requests to the EIGRP hub router
  A. to increase scalability by limiting the EIGRP query range

  ---

  Complex, redundant EIGRP networks can cause scalability problems. The best solution to this is to provide a means within the context of the EIGRP protocol itself to control traffic flows and limit query depth. The EIGRP Stub Router functionality in Cisco IOS Software Release 12.0(7)T can achieve this solution. The Enhanced Interior Gateway Routing Protocol (EIGRP) Stub Routing feature improves network stability, reduces resource utilization, and simplifies stub router configuration. Stub routing is commonly used in a hub and spoke network topology. In a hub and spoke network, one or more end (stub) networks are connected to a remote router (the spoke) that is connected to one or more distribution routers (the hub). The remote router is adjacent only to one or more

  distribution routers. The only route for IP traffic to follow into the remote router is through a distribution router. This type of configuration is commonly used in WAN topologies where the distribution router is directly connected to a WAN. The

  distribution router can be connected to many more remote routers. Often, the distribution router will be connected to 100 or more remote routers. In a hub and spoke topology, the remote router must forward all non local traffic to a distribution

  router, so it becomes unnecessary for the remote router to hold a complete routing table. Generally, the distribution router need not send anything more than a default route to the remote router.

  When using the EIGRP Stub Routing feature, you need to configure the distribution and remote routers to use EIGRP, and to configure only the remote router as a stub. Only specified routes are propagated from the remote (stub) router. The

  router responds to queries for summaries, connected routes, redistributed static routes, external routes, and internal routes with the message "inaccessible." A router that is configured as a stub will send a special peer information packet to all

  neighboring routers to report its status as a stub router. Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes, and a router that has a stub peer will not query that peer. The stub router

  will depend on the distribution router to send the proper updates to all peers.

  Reference:

  http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00 80087026.html

• Question 370:

  Refer to the exhibit.

  

  Given the partial configuration in the exhibit, which IPv6 statement is true?

  A. The configuration is an example of an encrypted IPv6 VPN tunnel.
  B. The configuration is an example of a one to one IPv6 tunnel.
  C. The configuration is an example of a 6to4 tunnel.
  D. The configuration is an example of a 4to6 tunnel.
  C. The configuration is an example of a 6to4 tunnel.