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

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

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

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.

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

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

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

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.

A.configure a hard-to-guess VTP domain name
B.use a hard-to-guess VTP password
C.use VTP transparent mode
D.implement VTP version 3

A. prefixes received from any other BGP peer and prefixes locally originated via networkstatements or redistributed to BGP
B. all prefixes in its IP routing table
C. only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
D. only prefixes received from EBGP peers and prefixes received from route reflectors
E. all prefixes in its routing table except the prefixes received from other EBGP peers
F. all prefixes in its routing table except the prefixes received from other IBGP peers

A.excessive collisions
B.FCS errors
C.runts
D.late collisions