Choose a CORRECT Statement on WAN Links

Multiple Choice

Choose a CORRECT statement on WAN links.

A) The T-1 circuit at the physical layer can carry only PPP (point-to-point) data link layer frames.
B) The T-1 circuit at the physical layer can carry only PSDN (ex. Frame Relay) data link layer frames.
C) It is possible that one data link frame (ex. Frame Relay) is encapsulated within another data link frame (ex. ATM) for delivery.
D) The border router that connects to a WAN link does NOT need to have LAN connectivity.
E) WiMax and Satellite technologies are designed for "narrowband" wireless communications.