Alcatel-Lucent 4A0-102 問題集

質問 1：
Click the exhibit.

Assuming router A is configured with "next-hop-self", what does the BGP update for prefix 192.168.0.1/27 contain
when it arrives at router B?
A. AS Path of 65100, Next Hop of router A.
B. AS Path of 65200 65100, Next Hop of router E.
C. AS Path of 65100, Next Hop of router E.
D. AS Path of 65200 65100, Next Hop of router
正解：A

質問 2：
Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following
BGP export policy?

A. "client1" routes will be rejected.
B. "client1" routes will be tagged with communities "North" and "West".
C. "client1" routes will be tagged with community "West".
D. "client1" routes will be tagged with community "North".
正解：D

質問 3：
A confederated AS is comprised of three members. One member is comprised of 4 routers, while the other two
members are comprised of 3 routers each. Assuming member ASs are fully meshed and use full mesh iBGP, what is
the required number of BGP sessions within the confederation?
A. 12
B. 15
C. 13
D. 14
正解：B

質問 4：
An Alcatel-Lucent 7750 SR is configured with a local preference of 250. If it receives a BGP update with a local
preference of 500, what local preference is sent to its eBGP peers?
A. None
B. 500
C. 250
D. 100
正解：A

質問 5：
Why is a full mesh of iBGP peers required?
A. To ensure that all routers run iBGP inside a transit AS.
B. To ensure proper route propagation inside a transit AS.
C. To maximize control plane scalability.
D. To ensure that all routers are directly connected.
正解：B

質問 6：
Click the exhibit.

Which of the following is a valid confederation configuration for Router R2?

A. Option A
B. Option C
C. Option D
D. Option B
正解：B

質問 7：
Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is
configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will
be present in router R4's BGP routing table?

A. Three primary paths,
B. One primary path and one backup path.
C. Two primary paths and one backup path.
D. One primary path and two backup paths.
正解：C

質問 8：
Which of the following is NOT considered an option of export policies?
A. Preventing unwanted NLRI from entering the AS.
B. Advertising customer networks into BGP.
C. Sending aggregates that summarize the AS s address space.
D. Sending MEDs to influence ingress traffic from peers.
正解：A

質問 9：
Which of the following is NOT a goal of BGP routing policies?
A. To protect external networks from instability.
B. To communicate the architecture of an AS to external ASs.
C. To protect the local AS and other external ASs from bad NLRI.
D. To optimize ingress and egress traffic patterns to best serve the users of the AS.
正解：B