Cisco 642-661 Online Practice Questions and Exam Preparation

Cisco 642-661 Online Questions & Answers

• Question 11:

  SIMULATION

  

  Check the answer below

  P1R3> enable P1R3# config terminal P1R3(config)# router bgp 65001 P1R3(config-router)# no synchronization P1R3(config-router)# neightbor 10.200.200.12 weight 100 P1R3(config-router)# end P1R3# clear ip bgp * soft in P1R3# show ip bgp P1R3# copy run start

• Question 12:

  DRAG DROP

  Select and Place:

  

  

• Question 13:

  When configuring BGP route dampening on Cisco routers, what is the correct default half-life- time?

  A. 120 minutes
  B. 45 minutes
  C. 60 minutes
  D. 15 minutes
  D. 15 minutes

• Question 14:

  Besides BGP policy scaling and IBGP mesh scaling, service providers need to concentrate on controlling _______.

  A. The AS-Path length by using AS-PATHprepending.
  B. The BGP query process by using route summarization.
  C. The number of routes being redistributed from BGP into the IGP using route-maps.
  D. The number of BGP updates and the size of the BGP forwarding tables using route aggregation.
  D. The number of BGP updates and the size of the BGP forwarding tables using route aggregation.

• Question 15:

  In a Transit AS, how do the internal routers within the Transit AS forward packets destined for the external networks using a scalable solution?

  A. using the default route
  B. using the IBGP routes, then using recursive lookup based on IGP information to resolve the BGP next-hop
  C. using the EBGP routes where the external networks are redistributed into the IBGP by the edge routers
  D. using the IGP routes where the external networks are redistributed into the IGP by the edge routers
  B. using the IBGP routes, then using recursive lookup based on IGP information to resolve the BGP next-hop

• Question 16:

  DRAG DROP

  Select and Place:

  

  

• Question 17:

  Given the following:

  The customer (AS 65100) is advertising the 172.0.0.0/8 prefix over the upper link without using AS-Path prepending.

  The customer (AS 65100) is advertising the 172.0.0.0/8 prefix with a prepended AS-Path of AS 65100 65100 65100 65100 over the lower link.

  Which two statements are true about the incoming traffic to 172.0.0.0/8? (Choose two)

  A. The lower link will be preferred over the upper link.
  B. The upper link will be preferred over the lower link.
  C. The upper link will act as a backup for the lower link.
  D. The lower link will act as a backup for the upper link.
  B. The upper link will be preferred over the lower link.
  D. The lower link will act as a backup for the upper link.

• Question 18:

  Complete the BGP configuration on R-1 so that the show ip bgp output reflects the following path selection?

  R-1#show ip bgp BGP table version is 9, local router ID is 172.16.10.1 Status codes: s suppressed, d damped, h history, *valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 172.20.0.0 10.10.20.1 150 65123 65122 i

  * 10.10.10.2 0 120 65122 i *> 172.25.0.0 10.10.21.1 150 65123 65124 i

  * 10.10.10.2 120 65122 65124 i *> 172.30.0.0 10.10.21.1 0 150 65123 i

  * 10.10.10.2 120 65122 65123 I hostname R-1 ! router bgp 65121 neighbor 10.10.10.2 remote-as 65122 neighbor 10.10.20.1 remote-as 65123

  A. neighbor 10.10.20.1 metric 0
  B. neighbor 10.10.10.2 metric 0
  C. neighbor 10.10.10.2 weight 120 neighbor 10.10.20.1 weight 150
  D. neighbor 10.10.10.2 local-preference 0 neighbor 10.10.20.1 local-preference 100
  C. neighbor 10.10.10.2 weight 120 neighbor 10.10.20.1 weight 150

• Question 19:

  Which two statements about a transit AS are correct? (Choose two.)

  A. A transit AS uses an IGP like OSPF or ISIS to propagate the external networks within the transit AS.
  B. Routes between ASs are always exchanged viaeBGP.
  C. iBGP sessions can be established between non directly connected routers.
  D. A transit AS haseBGP connection(s) to only one external AS.
  E. Core routers within a transit AS normally use default routing to reach the external networks.
  B. Routes between ASs are always exchanged viaeBGP.
  C. iBGP sessions can be established between non directly connected routers.

• Question 20:

  Which method could be used to improve the scalability of IS-IS used as the IBGP of an ISP?

  A. Use stub or totally stubbynonbackbone IS-IS areas.
  B. Use IS-IS route leaking into thenonbackbone IS-IS areas.
  C. Use IS-IS CSNP on Level-1-2 circuits.
  D. Use properinterarea route summarization.
  D. Use properinterarea route summarization.