多項選擇題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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1.單項選擇題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

2.多項選擇題Which two combinations are valid PAgP configurations that will set up a PAgP channel？（）

A.On-Passive
B.On-Auto
C.Passive-Active
D.Desirable-Auto
E.Active-Active
F.Desirable-Desirable

3.單項選擇題Which information is carried in an OSPFv3 intra-area-prefix LSA？ （）

A. IPv6 prefixes
B. link-local addresses
C. solicited node multicast addresses
D. IPv6 prefixes and topology information

4.單項選擇題Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？ （）

A. An IPv4-compatible tunnel is a static tunnel， but an 6to4 tunnel is a semiautomatic tunnel.
B. The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code.
C. An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
D. For an IPv4-compatible tunnel， the ISP assigns only IPv4 addresses for each domain， but for a 6to4 tunnel， the ISP assigns only IPv6 addresses for each domain.

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