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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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）.

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

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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Which OSPF LSA type does an ASBR use to originate a default route into an area？ （）

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Which OSPF LSA type does an ASBR use to originate a default route into an area？（）