Cisco 642-661 Online Practice Questions and Exam Preparation

Cisco 642-661 Online Questions & Answers

• Question 1:

  Why does a modern transit AS not need to have BGP synchronization enabled?

  A. A modern transit AS does not rely on redistribution of BGP routes into an IGP.
  B. A modern transit AS does not rely on redistribution of IGP routes into an IGP.
  C. A modern transit AS rely on redistribution of BGP routes into an IGP.
  D. A modern transit AS rely on redistribution of IGP routes into an IGP.
  A. A modern transit AS does not rely on redistribution of BGP routes into an IGP.

• Question 2:

  Which of the following statements about the BGP MED path attribute on Cisco routers is correct?

  A. If the MED is not attached to a BGP route, it defaults to 0 (best).
  B. By default, MED can be considered for routers coming from different autonomous systems.
  C. By default, MED can be considered for routers coming from differentintrafederation autonomous systems.
  D. Thebgp deterministic-med command is used to ensure that an accurate MED comparison is made across all routes received from different autonomous systems.
  A. If the MED is not attached to a BGP route, it defaults to 0 (best).

• Question 3:

  Which three actions are prerequisites to configuring the BGP link bandwidth feature? (Choose three.)

  A. configureeBGP multihop on eBGP peers
  B. enable Cisco Express Forwarding on the router
  C. enable BGP community propagation between link bandwidth advertising routers
  D. enable BGP synchronization
  E. configure BGP multipath first
  B. enable Cisco Express Forwarding on the router
  C. enable BGP community propagation between link bandwidth advertising routers
  E. configure BGP multipath first

• Question 4:

  DRAG DROP

  Select and Place:

  

  

• Question 5:

  Which two BGP prefix-update optimization strategies can be used to minimize the impact of BGP routing policy changes? (Choose two)

  A. route flap dampening
  B. soft reconfiguration
  C. BGP scanner
  D. Route refesh
  B. soft reconfiguration
  D. Route refesh

• Question 6:

  Based on the R1 router BGP configuration shown, which three statements are correct? (Choose three.)

  

  A. R1 is in AS 50101 according to the 192.168.100.1 neighbor.
  B. The 10.4.4.4 neighbor is an EBGP neighbor.
  C. BGP updates coming in from the 192.168.100.1 neighbor must be processed by thesetlp route- map.
  D. R1 is in AS 50101 according to the 10.1.1.1 neighbor.
  E. The 192.168.100.1 neighbor must be directly connected to R1.
  F. R1 is a route-reflector client.
  A. R1 is in AS 50101 according to the 192.168.100.1 neighbor.
  C. BGP updates coming in from the 192.168.100.1 neighbor must be processed by thesetlp route- map.
  E. The 192.168.100.1 neighbor must be directly connected to R1.

• Question 7:

  Match the correct relationship between the methods used to influence BGP path selection and the traffic flow it influences.

  1.

  setting the weight

  2.

  setting the MED

  3.

  setting the local preference

  4.

  setting the admin distance

  5.

  using recursive route lookup

  6.

  using AS-path prepending

  A. I-1,3;II-2,6
  B. I-1,3;II-2,5
  C. I-1,4;II-2,6
  D. I-1,4;II-2,5
  A. I-1,3;II-2,6

• Question 8:

  Which three statements are true about route reflectors? (Choose three.)

  A. If the route is learned from an EBGP peer by the route reflector, it is reflected to all IBGP and EBGP peers.
  B. If the route is learned from a client IBGP peer by the route reflector, it is reflected to all EBGP peers, non-clients, and clients (except the originating client).
  C. If the route is learned from a client IBGP peer by the route reflector, it is reflected to all clients only, except the originating client.
  D. If the route is learned from a non-client IBGP peer by the route reflector, it is reflected to EBGP peers and clients only.
  E. If the route is learned from a non-client IBGP peer by the route reflector, it is reflected to all EBGP peers only.
  A. If the route is learned from an EBGP peer by the route reflector, it is reflected to all IBGP and EBGP peers.
  B. If the route is learned from a client IBGP peer by the route reflector, it is reflected to all EBGP peers, non-clients, and clients (except the originating client).
  D. If the route is learned from a non-client IBGP peer by the route reflector, it is reflected to EBGP peers and clients only.

• Question 9:

  What is a key benefit of implementing the bgp dmzlink-bw command?

  A. increases BGP security by dynamically allocating community strings toeBGP routes
  B. establishes a secure BGP link betweeneBGP and iBGP peers
  C. enables the unequal cost path load balancing feature for external BGP links
  D. allows BGP to use link bandwidth as a metric when computing best route selection
  C. enables the unequal cost path load balancing feature for external BGP links

• Question 10:

  Which two of the following are true regarding the BGP Prefix-Based outbound route filtering feature? (Choose two.)

  A. Outbound route filtering is more effective when a distance vector IGP is used.
  B. Outbound route filtering can be configured for eitheriBGP or eBGP sessions.
  C. The outbound route filter can be defined in a Prefix list, Distribute list or Access lists.
  D. Outbound route filtering is configured only on a per-address family basis.
  E. IP multicast routes are not supported.
  D. Outbound route filtering is configured only on a per-address family basis.
  E. IP multicast routes are not supported.