How many bits are used to define a single unique physical MAC address etched onto a network interface card (NIC)? MCQ with Answer and Explanation

Question
How many bits are used to define a single unique physical MAC address etched onto a network interface card (NIC)?
A. 32 bits
B. 48 bits
C. 128 bits
D. 64 bits
Answer: Option B
Solution (By JKSSB Mock Tests)
A MAC (Media Access Control) address is a 48-bit (6-byte) permanent hardware identifier represented in hexadecimal notation.
This question belongs to: Computer Computer Networking
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Practice More Computer Networking Questions

Question #1
Which device is used to extend a network's physical range by amplifying signals?
A. Switch
B. Gateway
C. Router
D. Repeater
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Correct Answer: Option D

Explanation:
A repeater amplifies and regenerates signals to extend cable length.
This question belongs to: Computer Computer Networking
Question #2
Which network layer protocol is used for error reporting and diagnostic functions?
A. TCP
B. ICMP
C. ARP
D. UDP
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Correct Answer: Option B

Explanation:
ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.
This question belongs to: Computer Computer Networking
Question #3
In a physical Bus Topology, what happens if the main backbone cable line is cut anywhere along its length?
A. The nearest node transforms into a hub automatically.
B. The network splits into two separate, fully functional subnets.
C. All signal termination fails, causing massive signal bounce that disrupts communication across the entire layout.
D. The line switches to half-frequency full-duplex mode.
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Correct Answer: Option C

Explanation:
A sever in a bus network removes proper termination, causing signal reflection that corrupts data traffic for all connected devices.
This question belongs to: Computer Computer Networking
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