Cisco 642-661 Online Practice Questions and Exam Preparation

Cisco 642-661 Online Questions & Answers

• Question 101:

  A customer multihomed to two ISPs is assigned a different AS number from each ISP. In this case, which BGP configuration option can the customer use to resolve this issue?

  A. neighbor {ip-address} filter-list {as-pathacl number} out
  B. neighbor {ip-address} local-as {private-as}
  C. neighbor {ip-address} filter-list {as-pathacl number} in
  D. set as-pathprepend {as-number...}
  E. neighbor {ip-address} remove-private-as
  F. neighbor {ip-address}ebgp-multihip
  B. neighbor {ip-address} local-as {private-as}

• Question 102:

  Which two of these statements regarding BGP and admin distances are correct? (Choose two.)

  A. External BGP routes have a default admin distance of 5.
  B. External BGP routes have a default admin distance of 20.
  C. BGP admin distance does not influence the path selection algorithm, but does influence if BGP- learned routes are placed in the IP routing table.
  D. Internal BGP routes have a default admin distance of 5.
  E. BGP admin distances do not matter, since all BGP routes are automatically installed in the IP routing table.
  F. Internal BGP routes have a default admin distance of 20.
  B. External BGP routes have a default admin distance of 20.
  E. BGP admin distances do not matter, since all BGP routes are automatically installed in the IP routing table.

• Question 103:

  Which BGP configuration option is designed to reduce router processing load caused by unstable routes?

  A. bgp dampening
  B. no sync
  C. neighbor {ip-address} maximum-prefix {number}
  D. sync
  E. bgp scan-time
  F. bgp deterministic-med
  A. bgp dampening

• Question 104:

  Which regular expression can be used to match all routes originating in the local AS?

  A. *$
  B. .$
  C. ^$
  D. .*
  C. ^$

• Question 105:

  Which of these statements regarding the aggregate-address command is correct?

  A. Using the aggregate-address command with no command options specified will only advertise the aggregate address and suppress all the more specific routes.
  B. There is no difference between the aggregate-address command and the network command.
  C. The local BGP table must contain a more specific route if the aggregate-address command is used.
  D. Using the aggregate-address command with no command options specified will generate AS set path information.
  C. The local BGP table must contain a more specific route if the aggregate-address command is used.

• Question 106:

  A customer multihomed to two ISPs is assigned a different AS number from each ISP. In this case, which BGP configuration option can the customer use to resolve this issue?

  A. set as-pathprepend {as-number...}
  B. neighbor {ip-address} filter-list {as-pathacl number} in
  C. neighbor {ip-address} filter-list {as-pathacl number} out
  D. neighbor {ip-address} local-as {private-as}
  D. neighbor {ip-address} local-as {private-as}

• Question 107:

  Based on the following show ip bgp neighbors output from R-2, which two statements are true?

  R-2#show ip bgp neighbors BGP neighbor is 10.1.1.5, remote AS 65101, internal link Index 1, Offset 0, Mask 0x2 Route-Reflector Client BGP version 4, remote router ID 5.5.5.5 BGP state = Established, table version = 4, up for 00:01:29 Last read 00:00:29, hold time is 180, keepalive interval is 60 seconds Minimum time between advertisement runs is 5 seconds Received 13556 messages, 0 notifications, 0 in queue Sent 13454 messages, 0 notifications, 0 in queue Prefix advertised 0, suppressed 0, withdraw 0 Default weight 900 Inbound path policy configured Route map for incoming advertisement is test Connections established 31; dropped 30 Last reset 00:01:40, due to User reset 3 accepted prefixes consume 96 bytes 0 history paths consume 0 bytes 0 history paths consume 0 bytes

  A. R-2 is a route reflector client of the 10.1.1.5 neighbor.
  B. R -2 is a route reflector and the 10.1.1.5 neighbor is a client of R-2.
  C. R-2 has successfully established the IBGP session with the 10.1.1.5 neighbor.
  D. All the BGP updates from R-2 to the 10.1.1.5 neighbor must go through the route-map called "test".
  B. R -2 is a route reflector and the 10.1.1.5 neighbor is a client of R-2.
  C. R-2 has successfully established the IBGP session with the 10.1.1.5 neighbor.

• Question 108:

  In a multihomed environment with two ISP connections, which two statements are true? (Choose two.)

  A. The customer should not be configured to act as a transit AS between the two ISPs.
  B. It is recommended that the multi-homed customer use a registered (public) AS number.
  C. The customer can use Local Preference on the customer's edge routers to influence the BGP path selection process for the inbound traffic (traffic from the ISPs to the customer).
  D. The advertisement of the customer's IP address space can be conditioned by the customer's edge routers by using a static route to the null0 interface and by using the proper network statement under routerbgp.
  E. AS-Pathprepending can be configured on the customer's edge router to influence the BGP path selection process for the outbound traffic (traffic from the customer to the ISPs).
  A. The customer should not be configured to act as a transit AS between the two ISPs.
  B. It is recommended that the multi-homed customer use a registered (public) AS number.

• Question 109:

  Which configuration command ensures BGP will not advertise a route until all the routers within the AS have learned about the route via an IGP?

  A. router BGP {as-number} redistribute {IGP}
  B. router {IGP} redistribute BGP {as-number}
  C. bgp dampening
  D. network {network number} mask {subnet mask}
  E. synchronization
  F. bgp deterministic-med
  E. synchronization

• Question 110:

  Examine the topology shown above. Within Transit AS 51001, R3 is setup as a route reflector for R1 and R2, and R4 is setup as a route reflector for R5 and R6. In this case, how many IBGP sessions are required with the Transit AS 51001?

  

  A. 5
  B. 36
  C. 4
  D. 10
  E. 30
  F. 15
  A. 5