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单项选择题A network administrator needs to configure a router for a Frame Relay connection to a non-Cisco router. Which of the following commands will prepare the WAN interface for this connection?（）

A、Router(config-if)# encapsulation frame-relay q933a

B、Router(config-if)# encapsulation frame-relay ansi

C、Router(config-if)# encapsulation frame-relay ietf

D、Router(config-if)# encapsulation frame-relay isl

E、None of the above

  • C

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