多项选择题
A.IP B.X.25 C.Ethernet D.Frame-relay
Given the address 192.168.20.19/28, which of the follow...
多项选择题Given the address 192.168.20.19/28, which of the following are valid host addresses on this subnet?（）
A.192.168.20.29 B.192.168.20.16 C.192.168.20.17 D.192.168.20.31 E.192.168.20.0
在ISDN网络中，U接口定义在（）之间。A.TE1和NT2B.TE2和TAC.NT1和ISDN网络D.NT1和...
单项选择题在ISDN网络中，U接口定义在（）之间。
A.TE1和NT2 B.TE2和TA C.NT1和ISDN网络 D.NT1和NT2
A national retail chain needs to design an IP addressin...
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
