400-051 CCIE Routing and Switching
VCE Question Answer
Question NO : 1 Which two options are the two main phases of PPPoE? (Choose two.) A. B. C. D. E. F.
Active Discovery Phase IKE Phase Main Mode Phase PPP Session Phase Aggressive Mode Phase Negotiation Phase
Answer: AD http://www.examcollectionvce.com/vce-400-101.html
Question NO :2 Refer to the exhibit. Why is the OSPF state in 2WAY/DROTHER?
A. This is the expected output when the interface Ethernet0/0 of R1 is configured with OSPF Priority 0. B. There is a duplicate router ID. C. There is an MTU mismatch. D. There is an OSPF timer (hello/dead) mismatch. E. This is the expected output when R1 is the DR.
Answer: A http://www.examcollectionvce.com/vce-400-101.html
Question NO :3 In a no backbone OSPF area, all traffic that is destined to the Internet is routed by using a default route that is originated by the ABR. Which change in the configuration of the OSPF area type causes traffic from that area that is destined to the Internet to be dropped?
A. B. C. D.
The OSPF area changes from NSSA to totally stubby area. The OSPF area changes from NSSA to regular area. The OSPF area changes from stub area to totally stubby area. The OSPF area changes from stub area to NSSA.
Answer: D
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Question NO :4 Which measure does ISIS use to avoid sending traffic with a wrong MTU configuration? A.ISIS does not protect from MTU mismatch. B.MTU value is communicated in ISIS Sequence Number PDUs (SNP), and ISIS adjacency is not established if an MTU mismatch is detected. C.ISIS uses path MTU discovery as specified in RFC 1063. D.ISIS uses padding of hello packets to full MTU.
Answer: D http://www.examcollectionvce.com/vce-400-101.html
Question NO :5 Refer to the exhibit. Assuming that the peer is configured correctly and the interface is up, how many neighbors will be seen in the EIGRPv6 neighbor table on this IPv6-only router?
A. B. C. D. E.
one neighbor, which will use a local router-id of 6010. AB8. . /64 one neighbor, which will use a local router-id of 6020. AB8. . /64 none, because EIGRPv6 only supports authenticated peers none, because of the mismatch of timers none, because there is no EIGRP router ID configured
Answer: E
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Question NO :6 Which type of EIGRP routes are summarized by the auto-summary command? A. B. C. D.
internal routes that are learned from a peer that is outside the range of local network statements external routes that are learned from a peer that is inside the range of local network statements locally created routes that are outside the range of local network statements external routes that are learned from a peer that is outside the range of local network statements
Answer: B
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Question NO :7 What is the range of addresses that is used for IPv4-mapped IPv6 addresses? A. B. C. D. E.
2001. db9. . /32 2001. db8. . /32 2002. . /16 . . ffff. /16 . . ffff. 0. 0/96
Answer: E
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Question NO :8 Refer to the exhibit. Which statement is true?
A. R2 is directly connected to the receiver for this group and is the winner of an assert mechanism. B. R2 is directly connected to the receiver for this group, and it forwards the traffic onto Ethernet3/0, but it is forwarding duplicate traffic onto Ethernet3/0. C. R2 has the A flag (Accept flag) set on Ethernet 3/0. This is fine, since the group is in BIDIR PIM mode. D. R2 is directly connected to the receiver for this group and is the loser of an assert mechanism. E. The A flag is set until the SPT threshold is reached for this multicast group.
Answer: A http://www.examcollectionvce.com/vce-400-101.html
Question NO :9 As a best practice, when a router is configured as an EIGRP Stub, which routes should be received from its distribution neighbor? A. B. C. D.
the default route static routes internal routes only internal and external routes
Answer: A http://www.examcollectionvce.com/vce-400-101.html
Question NO: 10 Which two options describe two functions of a neighbor solicitation message? (Choose two.)
A. B. C. D. E. F.
It requests the link-layer address of the target. It provides its own link-layer address to the target. It requests the site-local address of the target. It provides its own site-local address to the target. It requests the admin-local address of the target. It provides its own admin-local address to the target.
Answer: AB
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