多项选择题
A.172.31.17.4/30
B.172.31.51.16/30
C.172.31.64.0/18
D.172.31.80.0/22
E.172.31.92.0/22
F.172.31.192.0/18
多项选择题 What two statistics appear in show frame-relay map output?（）
多项选择题 It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit.Which of the following processes are required to accomplish this task?（）
多项选择题 Which two privileged mode cisco ios commands can be used to determine a cisco router chassis serial number?（）