CCNA 200 301 Network Fundamentals

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Question : 41 of 55

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

to uniquely identify devices at Layer 2
to allow communication with devices on a different network
to differentiate a Layer 2 frame from a Layer 3 packet
to establish a priority system to determine which device gets to transmit first
to allow communication between different devices on the same network
to allow detection of a remote device when its physical address is unknown

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