Nokia 4A0-C01 問題集

質問 1：
In an IS-IS network, why does the DIS create a pseudo-node?
A. It represents a broadcast sub-network.
B. It represents a group of routers on the same non-broadcast network.
C. It represents the topological database of the backbone network in an IS-IS network.
D. It represents the complete topology of an IS-IS area.
正解：A

質問 2：
Click on the exhibit.

RSVP session state for LSP 1 has timed out on router R3.
Which of the following actions will router R3 initiate to clear the RSVP session?
A. Send a PATH Error message toward router R1.
B. Send a PATH Tear message toward router R1.
C. Send a PATH Error message toward router R6.
D. Send a PATH Tear message toward router R6.
正解：A

質問 3：
An operator needs to provision 6VPE on a 7750 SR that is also used to provide existing IPv4 VPRN services.
IPv6 VPRN customers use BGP as a PE-CE protocol.
Which of the following statements is FALSE regarding the configuration steps required?
A. PE routers must be configured to run MP-BGP and IPv6
B. MP-BGP sessions need to be configured in the service provider network to support a VPN-IPv6 address family.
C. None of the above statements are false.
D. The provider core must be configured to support IPv6
E. PE-to-CE BGP sessions need to be configured to support IPv6.
F. All of the above statements are false
正解：A

質問 4：
Which of the following statements regarding area border routers in an OSPF network is true?
A. The term backbone router has the same definition as the term area border router.
B. Area border routers connect the backbone area to other areas in an OSPF network.
C. An OSPF network needs at least one area border router to function.
D. an area border router must perform route summarization between areas.
正解：B

質問 5：
What is the term used for the updates sent by IS-IS?
A. Link State Advertisements
B. Intermediate System Update Packets
C. Link State Updates
D. Link State PDUs
正解：D

質問 6：
A new router is added to a broadcast network.
What is used by IS-IS as the tie breaker for selecting the DIS if the priorities are the same?
A. The existing DIS remains the DIS.
B. The Hello packet with the highest sequence number.
C. The router with the highest interface MAC address.
D. The router with the highest loopback address.
E. The router with the highest system ID.
正解：C

質問 7：
What is the protocol number for OSPF in the IP header?
A. OSPF does not use IP.
B. OSPF uses TCP, so the protocol number is 6.
C. OSPF uses UDP, so the protocol number is 17.
D. OSPF has its own protocol number.
正解：D

質問 8：
How does a DMP inform the downstream routers that it has merged detour tunnels?
A. The DMP summarizes PATH messages, giving each detour its own MSGJD.
B. The DMP sends the DMP_Object in each detour's PATH messages.
C. The DMP sends a single PATH message containing the merged DETOUR_Objects.
D. The DMP identifies itself as the previous hop in each detour's PATH message.
正解：C