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CompTIA 220-802 Certification Practice Test

Category - 802

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Which of the following is a unique 48-bit number that uniquely identifies an adapter on the network?

MAC address
IP address
Default gateway
Subnet mask

Explanation

Answer: A - MAC address is the 48 bit unique identifier on the NIC.

Key Takeaway: Media Access Control address (MAC address) is a unique identifier assigned to network adapters or network interface cards (NICs) by the manufacturer, primarily for unique identification on the Internet.

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