多项选择题
A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme?（）
A.255.255.255.0 B.255.255.255.128 C.255.255.252.0 D.255.255.255.224 E.255.255.255.192 F.255.255.248.0
多项选择题 Which three are characteristics of an IPV6 anycast address?（）
单项选择题 Which option is a valid IPv6 address?（）
单项选择题 Refer to the exhibit. In this VLSM addressing scheme, what summary address would be sent from routerA?（）
