For what two purposes does the Ethernet protocol use physical addresses? ()

Question

A.to uniquely identify devices at Layer 2

B.to allow communication with devices on a different network

C.to differentiate a Layer 2 frame from a Layer 3 packet

D.to establish a priority system to determine which device gets to transmit first

E.to allow communication between different devices on the same network

F.to allow detection of a remote device when its physical address is unknown

Answer 1

参考答案：A, E