Nokia 4A0-C01 問題集

質問 1：
Click on the exhibit.

The routers have an established IS-IS L2 adjacency on which IPv4 system addresses are exchanged. An operator successfully configures multi-topology IS-IS routing so that the IPv6 system addresses are also exchanged between routers.
After IPv6 has been configured, which of the following is TRUE?
A. Router R2 has two IS-IS adjacencies and four LSPs
B. Router R2 has two IS-IS adjacencies and two LSPs
C. Router R2 has three IS-IS adjacencies and six LSPs
D. Router R2 has two IS-IS adjacencies and three LSPs
E. Router R2 has three IS-IS adjacencies and four LSPs
F. Router R2 has three IS-IS adjacencies and three LSPs
正解：A

質問 2：
Click on the exhibit.

The path of a fast reroute protected LSP is R1-R2-R3.
Which of the following about the protected LSP path is TRUE?
A. If the R2-R3 link fails, router R3 becomes a PLR.
B. If the R1-R2 link fails, router R4 becomes an MP.
C. Router R1 is the LSP head-end and can be a PLR.
D. All routers along the path, R1, R2, and R3 can be PLRs.
正解：C

質問 3：
Click the exhibit button.

In the IS-IS network shown, router R1 has been configured to summarize network 20.20.1.0/24 and 20.20.2.0/24 as 20.20.0.0/16.
Which router's routing table will be reduced compared to the routing table before the summarization?
A. Router R4
B. Router R1
C. Router R2
D. Routers R1 and R2
正解：C

質問 4：
Click on the exhibit button below.

Given the configuration below, which of the following scenarios is FALSE?
A. Both the primary and secondary paths are explicitly defined.
B. The LSP has the same source and destination for both primary and secondary paths.
C. The LSP defined will use the primary path and will signal the secondary path to become active if the primary path fails.
D. The primary path is active and the secondary path is in hot standby.
正解：D

質問 5：
An IS-IS TE enabled router has an interface on a 500Mbps link and it is configured with a 25% subscription.
If this interface is not used by any LSPs. what value will be shown in the Reservable Bandwidth sub-TLV?
A. 125 Mbps
B. 2000 Mbps
C. 625 Mbps
D. 500 Mbps
正解：A

質問 6：
Which of the following regarding MPLS label value assignment is FALSE?
A. Label values may be dynamically assigned by IGP.
B. Label values may be reserved for special uses.
C. Label values may be dynamically assigned by RSVP-TE.
D. Label values may be dynamically assigned by LDP.
正解：A

質問 7：
Which of the following best describes a VPRN?
A. Layer 2 point-to-point service.
B. Layer 3 IP multipoint-to-multipoint VPN service.
C. Layer 3 direct Internet access service.
D. Layer 2 multipoint-to-multipoint service.
正解：B

質問 8：
Which of the following devices inspects the MPLS header in the received packet, and exchanges it for a new MPLS header?
A. LER
B. PE
C. eLER
D. LSR
E. iLER
正解：D