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單項(xiàng)選擇題

Which WAN technology was designed to give homes and small business high speed digital dial-up service over already existing communication infrastructure?（）

A. X25
B. Frame Relay
C. ATM
D. ISDN
E. ATX
F. None of the above

單項(xiàng)選擇題

You are preparing to create a point to point WAN by connecting a Cisco router with a Juniper router by way of their serial links. Which one of the following commands would you use?（）

A. TK1(config-if)# encapsulation hdlc ansi
B. TK1(config-if)# encapsulation ppp
C. TK1(config-if)# encapsulation LAPD
D. TK1(config-if)# encapsulation frame-relay ietf
E. TK1(config)#encapsulation ppp