4A0-102無料問題集「Alcatel-Lucent Border Gateway Protocol」

質問 1

Which of the following parameters does NOT have to match for an iBGP session to be successfully established?

（A）BGP version number.

（B）The local AS number.

（C）The Hold Time.

（D）Authentication.

正解：C 解答を投票する

質問 2

An Alcatel-Lucent 7750 SR is configured with a policy to export directly-connected networks to BGP. Which of the
following commands verifies that the export was successful?

（A）show router bgp routes

（B）show router route-table

（C）show router bgp routes <prefix> hunt

（D）show router bgp neighbor <ip-address> received-routes

正解：C 解答を投票する

質問 3

Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. Which routers must be configured with the
"configure router bgp igp-shortcuts rsvp-te" command?

（A）Routers R1and R4.

（B）Routers R1, R2, R3 and R4.

（C）Routers R2 and R3.

（D）Routers R6, R1, R4 and R5.

正解：A 解答を投票する

質問 4

Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertising prefix 192.168.1.0/27
into BGP. Which routers have the BGP update for the advertised prefix in their BGP table?

（A）Routers R1, R2, R3 and R4 only.

（B）Routers R1, R4 and R5 only.

（C）Routers R1, R2, R3, R4 and R5.

（D）Routers R1and R4 only.

正解：B 解答を投票する

質問 5

Click the exhibit.

Which of the following statements best describes the BGP sessions within the given network?

（A）The session between AS 65204 and AS 65206 is an intra-confederation eBGP session.

（B）The BGP sessions within the member ASs are known as inter-confederation BGP sessions.

（C）A BGP session is required between AS 65202 and AS 65204.

（D）The session between AS 65202 and AS 65206 is an iBGP session.

正解：A 解答を投票する

質問 6

A router in AS 65100 receives three routes for 138.120.0.0/16. The first route has an AS Path of 65200 65400 65300
and a local preference of 150. The second route has an AS Path of 65200 65300 and a local preference of 100. The
third route has an AS path of 65600 65300 and a local preference of 200. Which route will appear in the RIB-In?

（A）All routes will appear in the RIB-In.

（B）Only the third route will appear in the RIB-In.

（C）Only the second route will appear in the RIB-In.

（D）Only the first route will appear in the RIB-In.

正解：A 解答を投票する

質問 7

Two Alcatel-Lucent 7750 SRs are established BGP peers with the following add-paths configuration:
R1: configure router bgp add-paths ipv4 send 4 receive
R2: configure router bgp add-paths ipv4 send 2
If router R1 advertises three routes for a given prefix X, how many routes is router R2 expected to have for prefix X?

（A）3

（B）None

（C）4

（D）2

正解：A 解答を投票する

質問 8

Which of the following regarding the connections between eBGP peers is TRUE?

（A）eBGP peers do not propagate updates learned via iBGP.

（B）eBGP peers are usually directly connected to each other.

（C）eBGP peers are managed under a single administration.

（D）eBGP peers typically use system addresses for session establishment.

正解：B 解答を投票する

質問 9

Router R1, in AS 65540, has the export policy shown below. It advertises an aggregate route to eBGP peer router R2 in
65550. What is the AS Path of the aggregate route received by router R2?

（A）65540 1

（B）65550 65540

（C）65540 65540

（D）65540

正解：C 解答を投票する

質問 10

How is the aggregator attribute handled with 32-bit AS numbers?

（A）By using a dummy value of 23456 in the 16-bit AS aggregator field. This value lets the router know it needs to read
the 32-bit AS number that is contained in the nextTLV.

（B）Aggregation is not yet supported with 32-bit AS numbers.

（C）With the same method and attribute as 16-bit AS numbers.

（D）With the same method as 16-bit AS numbers, but using the AS4_Aggregator attribute.

正解：D 解答を投票する

質問 11

Click the exhibit.

When router A receives the BGP update for the 192.168.0.1/27 prefix, it propagates it to routers B and C.
What action is taken by router B when it receives the update?

（A）Router B propagates the update to routers A, C and

（B）Router B propagates the BGP update to routers D and C.

（C）Router B detects duplicates in its BGP database and discards the update.

（D）Router B propagates the BGP update to router D.

正解：D 解答を投票する

質問 12

Click the exhibit.

An update travels from AS 137000 to AS 135000, traversing both 32-bit and 16-bit AS Paths. What AS Path is seen by
AS 200?

（A）23456 23456

（B）137000 140000

（C）140000 137000

（D）200 140000 137000

正解：A 解答を投票する

質問 13

What are the well-known mandatory BGP attributes?

（A）Origin, Next Hop and Local Preference.

（B）Aggregator, Next Hop and AS Path.

（C）Local preference, AS Path and Next Hop.

（D）AS Path, Next Hop and Origin.

正解：D 解答を投票する

質問 14

Which of the following statements regarding BGP Add-Paths is FALSE?

（A）A BGP speaker must advertise the capability to send multiple paths to its peer.

（B）A BGP speaker must advertise the capability to receive multiple paths from its peer.

（C）Add-Paths capabilities are exchanged between peers after the BGP session is established.

（D）Add-Paths allows non-best paths to be advertised to a peer.

正解：C 解答を投票する

質問 15

Click the exhibit.

Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP 2?

（A）The update is sent to all routers in ISP 1.

（B）The update is sent to router R2 in ISP 1.

（C）The update is sent to routers R2 and R3 in ISP 1, and to router R3 in ISP 2.

（D）The update is sent to routers R2 and R3 in ISP 1.

正解：A 解答を投票する

4A0-102 無料問題集「Alcatel-Lucent Border Gateway Protocol」

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