Vendor: Cisco
Exam Code: 400-101
Exam Name: CCIE Routing and Switching Written Exam, v5.0

QUESTION 1
Which two options are reasons for TCP starvation? (Choose two.)

A.    The use of tail drop
B.    The use of WRED
C.    Mixing TCP and UDP traffic in the same traffic class
D.    The use of TCP congestion control

Answer: CD

QUESTION 2
Which type of port would have root guard enabled on it?

A.    A root port
B.    An alternate port
C.    A blocked port
D.    A designated port

Answer: D

QUESTION 3
Which statement about the feasibility condition in EIGRP is true?

A.    The prefix is reachable via an EIGRP peer that is in the routing domain of the router.
B.    The EIGRP peer that advertises the prefix to the router has multiple paths to the destination.
C.    The EIGRP peer that advertises the prefix to the router is closer to the destination than the router.
D.    The EIGRP peer that advertises the prefix cannot be used as a next hop to reach the destination.

Answer: C

QUESTION 4
Which two statements about the function of the stub feature in EIGRP are true? (Choose two.)

A.    It stops the stub router from sending queries to peers.
B.    It stops the hub router from sending queries to the stub router.
C.    It stops the stub router from propagating dynamically learned EIGRP prefixes to the hub routers.
D.    It stops the hub router from propagating dynamically learned EIGRP prefixes to the stub routers.

Answer: BC

QUESTION 5
In which type of EIGRP configuration is EIGRP IPv6 VRF-Lite available?

A.    stub
B.    named mode
C.    classic mode
D.    passive

Answer: B

QUESTION 6
Two routers are trying to establish an OSPFv3 adjacency over an Ethernet link, but the adjacency is not forming. Which two options are possible reasons that prevent OSPFv3 to form between these two routers? (Choose two.)

A.    mismatch of subnet masks
B.    mismatch of network types
C.    mismatch of authentication types
D.    mismatch of instance IDs
E.    mismatch of area types

Answer: DE

QUESTION 7
Like OSPFv2, OSPFv3 supports virtual links. Which two statements are true about the IPv6 address of a virtual neighbor? (Choose two.)

A.    It is the link-local address, and it is discovered by examining the hello packets received from the virtual neighbor.
B.    It is the link-local address, and it is discovered by examining link LSA received by the virtual neighbor.
C.    It is the global scope address, and it is discovered by examining the router LSAs received by the virtual neighbor.
D.    Only prefixes with the LA-bit not set can be used as a virtual neighbor address.
E.    It is the global scope address, and it is discovered by examining the intra-area-prefix-LSAs received by the virtual neighbor.
F.    Only prefixes with the LA-bit set can be used as a virtual neighbor address.

Answer: EF

QUESTION 8
Which field is specific to the OPSFv3 packet header, as opposed to the OSPFv2 packet header?

A.    checksum
B.    router ID
C.    AuType
D.    instance ID

Answer: D

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