Câu 114: 200-301: Cisco Certified Network Associate (CCNA)

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

1. A. to uniquely identify devices at Layer 2 — đáp án hiện tại
2. B. to allow communication with devices on a different network
3. C. to differentiate a Layer 2 frame from a Layer 3 packet
4. D. to establish a priority system to determine which device gets to transmit first
5. E. to allow communication between different devices on the same network — đáp án hiện tại
6. F. to allow detection of a remote device when its physical address is unknown