單項選擇題Which IPv6 address is the equivalent of the IPv4 interface loopback address 127.0.0.1?()

A.::1
B.::
C.2000::/3
D.0::/10


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2.單項選擇題You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?()

A.192.168.252.8 255.255.255.248
B.192.168.252.8 255.255.255.252
C.192.168.252.16 255.255.255.240
D.192.168.252.0 255.255.255.252
E.192.168.252.16 255.255.255.252

3.單項選擇題Which command encrypts all plaintext passwords?()

A.Router(config)#password-encryption
B.Router(config)#service password-encryption
C.Router#service password-encryption
D.Router# password-encryption

4.單項選擇題Which command enables IPv6 forwarding on a cisco router?()

A.ipv6 host
B.ipv6 unicast-routing
C.ipv6 local
D.ipv6 neighbor

5.多項選擇題What are three features of the IPV6 protocol?()

A.complicated header
B.plug-and-play
C.no broadcasts
D.checksums
E.optional IPsec
F.autoconfiguration