Refer to the exhibit.Which statement describes DLCI 17?()<br /> <img src="https://img.ppkao.com/2018-07/xiashuhui/2018072313494257926.jpg" /><br /> <p> Refer to the exhibit.Which statement describes DLCI 17?()<br /> <img src="https://img.ppkao.com/2018-07/xiashuhui/2018072313494257926.jpg" /><br /> </p>
A、A.DLCI 17 describes the ISDN circuit between R2 and R3.
B、B.DLCI17 describes a PVC on R2.It cannot be used on R3 or R1.
C、C.DLCI17 is the Layer 2 address used by R2 to describe a PVC to R3.
D、D.DLCI17 describes the dial-up circuit from R2 and R3 to the service provider.