Alcatel-Lucent 4A0-102 問題集

質問 1：
Which of the following AS Paths will match the regular expression "65100."?
A. "65200 65100"
B. "65100 65200''
C. "65100"
D. "65100 65250 65200"
正解：B

質問 2：
Which of the following is TRUE if the local state of BGP is OpenConfirm?
A. The local system has received a Keepalive message and is ready to exchange updates.
B. The local system is exchanging Update messages with its neighbor.
C. The local system has sent a Keepalive message to its neighbor and is waiting to receive one back.
D. The local system has sent an Open message to its neighbor and is waiting to receive one back.
正解：C

質問 3：
Which of the following best describes the relationship between locally configured policies and the direction of traffic?
A. Import policies affect the way the local AS receives traffic, while export policies affect the way it sends traffic.
B. Both import and export policies affect the way the local AS sends traffic, but not the way it receives traffic.
C. Import policies affect the way the local AS sends traffic, while export policies affect the way it receives traffic.
D. Both import and export policies affect the way the local AS receives traffic, but not the way it sends traffic.
正解：C

質問 4：
Click the exhibit.

AS 65540 routers are iBGP fully-meshed. Assume routers R4, R5 and R6 are configured with addpaths ipv4 send 2
receive". Which routes to 192.168.0.1/27 is router R6 expected to have in its BGP routing table?
A. Two routes; one from router R4 and one from router R5.
B. Two routes from router R4.
C. Two routes from router R5.
D. Four routes; two from router R4 and two from router R5.
正解：D

質問 5：
Click the exhibit.

Routers C and E are route reflectors. When the update for prefix 192.168.2.0/24 is received at router F, what will be
the Originator_ID attribute?
A. The router ID of router
B. The router ID of router
C. The router ID of router
D. It will not be set.
正解：B

質問 6：
Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?
A. They are discarded if not recognized by the recipient.
B. They must be recognized by all peers and included in all BGP updates.
C. They must be recognized by all peers and optionally included in BGP updates.
D. The receiving router sends a notification if a well-known discretionary attribute is not present in an update.
正解：C

質問 7：
Which of the following is FALSE regarding the 16-bit public autonomous system numbers?
A. They are assigned by the ISPs for enterprise networks.
B. They are allocated to the RIRs by ICANN/IAN
C. They range from 1 to 56319.
D. They are used when connecting ASs on the Internet.
正解：A

質問 8：
A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for
10.0.0.0/8. Both routes have reachable next hops. Which of the following is TRUE?
A. Both routes are in the route table.
B. Only the BGP route is in the route table.
C. Only the OSPF route is in the route table.
D. None of the routes is in the route table.
正解：A

質問 9：
Click the exhibit.
AS 65540 routers are iBGP fully-meshed. Prefixes advertised by router R2 have a local preference of 200. Router R1
advertises the prefix 192.168.1.0/27 to routers R2 and R3. Assuming that router R3 is configured with "advertise-
external", what is the expected output of "show router bgp routes" when executed on router R4?

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