What is a MAC address? MCQ with Answer and Explanation

What is a MAC address?

A. A 48-bit physical address burned into the NIC

B. A 16-bit port number

C. A 32-bit logical address

D. A 64-bit address used for IPv6

Answer: Option A

MAC (Media Access Control) address is a 48-bit unique identifier assigned to network interfaces.

This question belongs to: Computer Computer Networking

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Question #1 Report Error

Which of the following is a well-known port for FTP data transfer?

A. 21

B. 20

C. 22

D. 23

Correct Answer: Option B

Explanation:
FTP uses port 20 for data transfer and port 21 for control.

This question belongs to: Computer Computer Networking

Question #2 Report Error

Which protocol is used to manage multicast group memberships?

A. IGMP

B. DHCP

C. ICMP

D. ARP

Correct Answer: Option A

Explanation:
IGMP (Internet Group Management Protocol) manages multicast group memberships.

This question belongs to: Computer Computer Networking

Question #3 Report Error

Which IPv4 address class range is explicitly reserved for multicast distribution groups rather than individual node assignments?

A. Class A

B. Class E

C. Class B

D. Class D

Correct Answer: Option D

Explanation:
Class D IP addresses span from 224.0.0.0 to 239.255.255.255 and are reserved worldwide for multicasting workflows.

This question belongs to: Computer Computer Networking