Which of the following parameters is used by an IPv4 router to ensure that a data packet cannot loop indefinitely across a network? MCQ with Answer and Explanation

Which of the following parameters is used by an IPv4 router to ensure that a data packet cannot loop indefinitely across a network?

A. Subnet Mask value

B. Loopback index flag

C. MAC Destination header

D. Time to Live (TTL) / Hop Limit field

Answer: Option D

The TTL field in an IPv4 header is decremented by 1 at each router hop. If the TTL reaches 0, the packet is dropped, preventing routing loops.

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Question #1 Report Error

Which of the following is a characteristic of a MAN?

A. Uses microwave links

B. Covers a large city

C. Covers a room

D. Covers a country

Correct Answer: Option B

Explanation:
MAN spans a metropolitan area, larger than LAN but smaller than WAN.

This question belongs to: Computer Computer Networking

Question #2 Report Error

What is the maximum transmission unit (MTU) for Ethernet?

A. 64 bytes

B. 1518 bytes

C. 1500 bytes

D. 1460 bytes

Correct Answer: Option C

Explanation:
The Ethernet MTU is 1500 bytes for the payload, not including headers.

This question belongs to: Computer Computer Networking

Question #3 Report Error

Which topology is commonly used in modern Ethernet networks?

A. Bus

B. Ring

C. Star

D. Mesh

Correct Answer: Option C

Explanation:
Star topology with a central switch is the most common topology in modern Ethernet LANs.

This question belongs to: Computer Computer Networking