A.HDLC B.PPP C.ICMP D.Frame-Relay
A.X.25 B.帧中继 C.ATM D.PSTN
A.Router> B.Router(config) C.Router D.Router(config-if)
A.RAM B.NVRAM C.Shared D.Flash
A.displsy interface status B.show interface C.show status interface D.display interface
A.show running-config B.show startup-config C.show version D.show controllers
A.copy running-config tftp B.copy startup-config tftp C.copy tftp running-config D.copy tftp startup-config
A.show startup-config B.show RAM-config C.show running-config D.show config
A.Ctrl+A B.Ctrl+Z C.exit D.exec
A.IGRP B.RIP C.ICMP D.RARP