单项选择题
A.172.16.0.0/16
B.172.16.0.0/20
C.172.16.0.0/24
D.172.32.0.0/16
E.172.32.0.0/17
F.172.64.0.0/16
多项选择题 Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme?（）
单项选择题 How many bits are contained in each field of an IPv6 address？（）
单项选择题 Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?（）
