Cisco 642-661 Online Practice Questions and Exam Preparation

Cisco 642-661 Online Questions & Answers

• Question 61:

  By default, which BGP path attribute is stripped in the outgoing IBGP updates?

  A. Origin
  B. AS-Path C. Next Hop
  D. Communities
  D. Communities

• Question 62:

  What is a key benefit of BGP dynamic update peer groups?

  A. Newly configured BGP neighbors have peer group template configurations dynamically applied.
  B. Dynamic update groups useiBGP neighbor information to automatically calculate route reflector cluster configurations.
  C. Routing updates to the same destination are grouped to increase BGP efficiency.
  D. Neighbors in a peer group are no longer required to share the same outbound routing policies.
  E. BGP configurations are automatically optimized by routers which dynamically create BGP peer groups.
  D. Neighbors in a peer group are no longer required to share the same outbound routing policies.

• Question 63:

  Which four attributes are used by BGP to detect routing loops? (Choose four.)

  A. Originator ID
  B. Community ID
  C. AS-Path
  D. Cluster ID
  E. Cluster List
  A. Originator ID
  C. AS-Path
  D. Cluster ID
  E. Cluster List

• Question 64:

  Which two statements are true about multihomed customers? (Choose two)

  A. The customer usually uses provider assigned (PA) address space.
  B. The customer usually uses provider independent (PI) address space.
  C. Static routing is always adequate between the customer and service provider.
  D. The customer runs BGP with the service provider using either a private or a public AS number.
  B. The customer usually uses provider independent (PI) address space.
  D. The customer runs BGP with the service provider using either a private or a public AS number.

• Question 65:

  What is a key benefit of implementing conditional route injection in BGP networks?

  A. allows the injection of prefix summaries without using the aggregate-address command
  B. eliminates the complexity of route aggregation when using the network command
  C. allows the injection of more specific routes based on administrative policies
  D. provides for link redundancy by conditionally injecting active and standby routes
  E. eliminates the need for static routes to inject a default route
  C. allows the injection of more specific routes based on administrative policies

• Question 66:

  Based on the show ip route bgp output and the BGP configuration shown in the exhibit, which BGP prefixes will be advertised by P1R1? (Choose four.)

  

  A. 192.168.12.0/22
  B. 192.168.20.0/24
  C. 192.168.23.0/24
  D. 192.168.12.0/24
  E. 192.168.15.0/24
  F. 192.168.20.0/22
  A. 192.168.12.0/22
  B. 192.168.20.0/24
  C. 192.168.23.0/24
  F. 192.168.20.0/22

• Question 67:

  How do BGP confederations reduce the requirements for a full-mesh iBGP configuration?

  A. By splitting the autonomous system into a number of smaller autonomous systems and usingiBGP sessions among them.
  B. By modifying theiBGP split horizon rule.
  C. By modifying theeBGP split horizon rule.
  D. The combining multiple IBGP sessions into a single IBGP session over loopback interface.
  A. By splitting the autonomous system into a number of smaller autonomous systems and usingiBGP sessions among them.

• Question 68:

  How can you prevent multihomed customers with connections to two service providers from acting as a transit AS?

  A. Enable BGP synchronization on all the customer routers
  B. Use MED to influence the inbound traffic from the ISPs.
  C. Use conditional advertisements when sending BGP updates to the ISPs.
  D. Use an AS-path access-list to filter the BGP updates to the ISPs.
  E. Use static routing to the ISPs.
  D. Use an AS-path access-list to filter the BGP updates to the ISPs.

• Question 69:

  Which two statements are true about an EBGP session or an IBGP session? (Choose two.)

  A. IBGP uses AS-Path to detect routing information loops within the AS.
  B. EBGP routes have a default Admin Distance of 20 and IBGP routes have a default Admin Distance of 200.
  C. No BGP attributes are changed in EBGP updates except for the next-hop attribute if next- hopself is configured.
  D. IBGP uses split horizon to prevent routing information loops; routes learned from an IBGP peer are not advertised to another IBGP peer.
  B. EBGP routes have a default Admin Distance of 20 and IBGP routes have a default Admin Distance of 200.
  D. IBGP uses split horizon to prevent routing information loops; routes learned from an IBGP peer are not advertised to another IBGP peer.

• Question 70:

  DRAG DROP

  Select and Place: