單項(xiàng)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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1.單項(xiàng)選擇題Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?（）

A.172.16.16.0
B.172.16.24.0
C.172.16.0.0
D.172.16.28.0

2.單項(xiàng)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(xiàng)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(xiàng)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(xiàng)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