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.

Question

Quizplus · Accepted Answer

It is possible for one data link layer frame (ex. Frame Relay) to be encapsulated within another data link layer frame (ex. ATM) for delivery. The other statements are incorrect. A T-1 circuit at the physical layer can carry different types of data link frames, not just PPP or PSDN. The border router connecting to a WAN link usually needs to have LAN connectivity. WiMax and Satellite technologies are designed for "broadband" wireless communications, not "narrowband."

Choose a CORRECT Statement on WAN Links