4A0-103問題集、Alcatel-Lucent実際の試験問題

質問 1

If an Alcatel-Lucent 7750 LSR receives a labeled packet with a outer label TTL of 250 and an inner label TTL of 251, which of the following statements is true?

A. The packet will be label switched; the outer label TTL will be 249 and the inner label TTL will be 251.

B. The packet will be label switched; the outer label TTL will be 249 and the inner label TTL will be 250.

C. The packet will be label switched; both the outer label TTL and the inner label TTL will be 249, because they must be the same.

D. The packet will be label switched; both the outer label TTL and the inner label TTL will be 250.

正解: A

質問 2

Click on the exhibit.

An LDP tunnel is established on router R1 towards router R6. The link between routers R2 and R4 goes down. What will happen to the MPLS data traffic to router R6 IMMEDIATELY after the link goes down?

A. MPLS data traffic will not be discarded because of fast reroute capability on router R2.

B. MPLS data traffic will be discarded unless the LDP tunnel has a standby secondary path.

C. MPLS data traffic will be discarded until the IGP finds a new next-hop to router R3.

D. MPLS data traffic will not be discarded because router R1 received labels from both next-hops, routers R2 and R3.

正解: B

質問 3

An Alcatel-Lucent 7750 SR label switches a packet it receives. The packet has an outer label TTL of 250 and an inner label TTL of 251. Which of the following is TRUE?

A. The outer label TTL will be 249 and the inner label TTL will be 251.

B. The outer label TTL will be 249 and the inner label TTL will be 250.

C. The outer label TTL will be 251 and the inner label TTL will be 252.

D. The outer label TTL will be 251 and the inner label TTL will be 251.

正解: A

質問 4

Click on the exhibit.

An LDP-over-RSVP tunnel is established between PE-1 and PE-2. Which of the following is NOT required to protect the LDP-over-RSVP tunnel?

A. ABR-1 requires T-LDP sessions to all ABRs in area 0.

B. PE-1 requires T-LDP sessions to both ABR-1 and ABR-2.

C. PE-1 requires a full mesh of RSVP-TE LSPs to all routers in area 1.

D. PE-1 requires fast reroute enabled on all RSVP-TE LSPs.

正解: C

質問 5

Which LSA is used for OSPF-TE purposes?

A. Type 8 LSA ?TE router LSA

B. Type 10 LSA ?Area local LSA

C. Type 9 LSA ?Link local LSA

D. Type 11 LSA ?Network LSA

正解: B

質問 6

Click on the exhibit.

What is the possible reason that the label for prefix 192.10.1.2/32 is not active?

A. The router does not have a route to reach to the prefix 192.10.1.2/32.

B. The router does not have a route to reach to the peer 10.10.10.2/32.

C. The router does not have an export policy defined to export the prefix 192.10.1.2/32 into LDP.

D. The router receives an invalid label for the prefix 192.10.1.2/32 from its peer.

正解: A

質問 7

Which of the following devices can originate an opaque LSA?

A. ABR only

B. Backbone router only

C. TE enabled OSPF routers

D. ASBR only

正解: C

質問 8

Click on the exhibit.

All links have 1 Gbps unreserved bandwidth initially. After the LSP's primary and standby secondary paths are signaled, how much bandwidth is reserved on the link between routers R1 and R2?

A. If Fixed Filter reservation style is used, 300Mbps is reserved.

B. If Shared Explicit reservation style is used, 700Mbps is reserved.

C. If Fixed Filter reservation style is used, 400Mbps is reserved.

D. If Shared Explicit reservation style is used, 400Mbps is reserved.

正解: D

質問 9

An LSP is configured with a fully loose path and CSPF is not enabled. An LSR receives the
first PATH message for this LSP. Which of the following is NOT performed by the LSR?

A. The LSR looks up the PATH message's destination IP address in the FIB.

B. The LSR forwards the PATH message based on the HOP object in the RSB.

C. The LSR stores the PATH message in the PS

D. The LSR regenerates and forwards a new PATH message.

正解: B

質問 10

Which of the following regarding the location of an MPLS label is FALSE?

A. The MPLS label value may be carried in a shim header.

B. The MPLS label value may be carried in an OSPF header.

C. The MPLS label value may be carried in an ATM header.

D. The MPLS label value may be carried in a Frame Relay header.

正解: B

質問 11

Which of the following about LSPs is FALSE?

A. Constraint-based LSPs must use RSVP-TE signaling.

B. Constraint-based LSPs are calculated using the head-end router's TED.

C. IGP-based LSPs are calculated based on information contained in routing tables.

D. IGP-based LSPs must use LDP signaling.

正解: D

質問 12

Click on the exhibit.

All links have 1 Gbps unreserved bandwidth initially and all LSPs have the least-fill feature enabled. After the two LSPs have been signaled as shown, two additional LSPs are configured.
LSP-3 is signaled first with 50Mbps reserved. LSP-4 is signaled after with 400Mbps reserved.
Which paths will CSPF choose for LSP-3 and LSP-4?

A. Both LSP-3 and LSP-4 take R1-R2-R4-R6.

B. LSP-3 takes R1-R3-R5-R6 and LSP-4 takes R1-R2-R4-R6.

C. CSPF randomly chooses one of the equal cost paths for the two LSPs.

D. LSP-3 takes R1-R2-R4-R6 and LSP-4 takes R1-R3-R5-R6.

E. Both LSP-3 and LSP-4 take R1-R3-R5-R6.

正解: E

質問 13

Which one of the following statements regarding RSVP LSP configuration is true?

A. Interfaces must be individually created in RSVP.

B. Path definitions must include at least one hop entry.

C. LSPs must always terminate on a system ID.

D. MPLS and RSVP must be enabled on all routers.

正解: D

Alcatel-Lucent Multi Protocol Label Switching - 4A0-103 模擬練習