What is the significance of the first octet in an IP address? MCQ with Answer and Explanation

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What is the significance of the first octet in an IP address?

A. It identifies the host

B. It identifies the broadcast domain

C. It determines the network class

D. It determines the subnet mask

Answer: Option C

Solution (By JKExamLibrary)

The first octet of an IP address indicates the class (A, B, C, etc.) based on the leading bits.

This question belongs to: Computer Computer Networking

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

A. UDP

B. ICMP

C. ARP

D. TCP

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Correct Answer: Option B

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

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Question #2 Report Error

Which of the following is an advantage of a switch over a hub?

A. Lower cost

B. Intelligence to send data only to the destination port

C. Works over longer distances

D. Supports more protocols

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Correct Answer: Option B

Explanation:
Switches learn MAC addresses and forward frames only to the intended port, reducing unnecessary traffic.

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What is a default gateway in a network?

A. The network switch

B. The primary DNS server

C. The DHCP server

D. The device that routes traffic to other networks

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Correct Answer: Option D

Explanation:
The default gateway is a router that connects the local network to external networks.

This question belongs to: Computer Computer Networking

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