There are many types of WAN interfaces, which of the following description of WAN interfaces is incorrect?

There are many types of WAN interfaces, which of the following description of WAN interfaces is incorrect?
A . V24 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation.
B . V35 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation.
C . The BRI/PRI interface is used for ISDN access. The default link encapsulation is PPP.
D . G.703 interface provides high-speed data synchronization communication services.

View Answer

Answer: B