What is the purpose of a VLAN tag in Ethernet frames? MCQ with Answer and Explanation

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What is the purpose of a VLAN tag in Ethernet frames?

A. To indicate frame length

B. To encrypt the frame

C. To prioritize traffic

D. To identify which VLAN the frame belongs to

Answer: Option D

Solution (By JKSSB Mock Tests)

VLAN tags (802.1Q) are added to Ethernet frames to specify the VLAN membership.

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Which network layer protocol is used for error reporting and diagnostic functions?

A. ICMP

B. UDP

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Correct Answer: Option A

Explanation:
ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.

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Question #2

Which device is used to connect multiple computers in a LAN using twisted-pair cables?

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Correct Answer: Option A

Explanation:
Hubs and switches are used to interconnect devices within a LAN.

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Question #3

Which of the following represents a valid IPv6 address string format?

A. [http://www.google.com/ipv6](https://www.google.com/search?q=http://www.google.com/ipv6)

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Correct Answer: Option B

Explanation:
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