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
正确答案:C
答案解析:有
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