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

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QUESTION 16

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

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

Correct Answer: AE

Section: Introduction

Explanation

Explanation/Reference:

Physical addresses (also known as link or MAC addresses) identify devices at layer 2 (A). They can be used to deliver frames between different devices on the

same link (subnet, network) (E). To cross different links/subnets, we use layer 3 addresses.