Which of the following are key characteristics of PPP?（）A、can be used over analog circuitsB、maps Layer 2 to Layer 3 addressC、encapsulates several routed protocolsD、supports IP onlyE、provides error correction
Which of the following are key characteristics of PPP?（）
- A、can be used over analog circuits
- B、maps Layer 2 to Layer 3 address
- C、encapsulates several routed protocols
- D、supports IP only
- E、provides error correction
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