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单项选择题 Refer to the exhibit. Routers A and B are directly connected and running EIGRP， but they are unable to form a neighbor relationship. What is the most likely cause？（）

A. The network statements are misconfigured.
B. The IP address statements are misconfigured.
C. The autonomous system is misconfigured.
D. There is a physical issue with the cable.

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1.单项选择题 Refer to the exhibit. Routers A and B are directly connected. Given the configuration， how many EIGRP routes will router B see in its routing table？（）

A. 0
B. 1
C. 2
D. 3
E. 4

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2.单项选择题Which OSPF LSA type does an ASBR use to originate a default route into an area？（）

A. LSA 1
B. LSA 3
C. LSA 4
D. LSA 5
E. LSA 7

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3.单项选择题Which one of these statements is true of OSPF type 5 LSAs？（）

A. They are used to summarize area routes to other areas.
B. They are used in not-so-stubby areas to propagate external routes.
C. They are used to notify areas of the ASBR.
D. They are flooded to all areas except stub areas （external route）.

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4.单项选择题When a BGP router is not capable of understanding 4-byte AS numbers， it will see 4-byte AS numbers as aspecial， reserved， 2-byte AS number in the AS path. Which 2-byte AS number is this reserved one？（）

A.00000
B.12345
C.23456
D.65000
E.99999

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5.单项选择题During the IPv6 address resolution， a node sends a neighbor solicitation message in order to discover which of these？（）

A. The Layer 2 multicast address of the destination node
B. The solicited node multicast address of the destination node
C. The Layer 2 address of the destination node based on the destination IPv6 address
D. The IPv6 address of the destination node based on the destination Layer 2 address

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6.多项选择题Which two tunneling techniques in IPv6 do not require an IPv4 tunnel destination in the configuration？（）

A.6to4
B.6over4
C.ISATAP
D.GRE

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7.多项选择题Which two of the following are considered valid router IDs for EIGRPv6？（）

A.0.0.0.1
B.0.255.0.1
C.2001：DB8：：1
D.2001：DB8：ABCD：FEEF：：1

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8.多项选择题Which two IPv6 address pairs can be assigned on a point-to-point link with a /125 mask？（）

A.2001：DB8：：1 and 2001：DB8：：2
B.2001：DB8：：9 and 2001：DB8：：10
C.2001：DB8：：10 and 2001：DB8：：17
D.2001：DB8：：1 and 2001：DB8：：18

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9.多项选择题Which three causes could prevent a host from getting an IPv6 address with stateless autoconfiguration？（）

A.The autoconfig command is missing from the router interface.
B.IPv6 multicast routing is not enabled on the router interface.
C.IPv6 unicast routing is not enabled on the router interface.
D.The router interface is configured with a /63 mask.
E.The router interface is configured with a /65 mask.

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10.单项选择题Which IPv6 address would you ping to determine if OSPFv3 is able to send and receive unicast packets across a link？（）

A. anycast address
B. site-local multicast
C. global address of the link
D. unique local address
E. link-local address

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