Refer to the exhibit.Which statement describes DLCI 17?（）
- A、DLCI 17 describes the ISDN circuit between R2 and R3.
- B、DLCI 17 describes a PVC on R2.It cannot be used on R3 or R1.
- C、DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
- D、DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.
正确答案:C
答案解析:有
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