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Question

For which one of the following reasons does Internet Protocol(IP) use the time-to-live (TTL) field in the IP datagram header?

A

Ensure packets reach destination within that time

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B

Prevent packets from looping indefinitely

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C

Limit the time for which a packet gets queued in intermediate routers

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D

Discard packets that reach later than that time

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Solution

The correct option is B Prevent packets from looping indefinitely
TTL is a mechanism that limits the lifespan or lifetime of data in a network. Once the prescribed even count or time span has elapsed, data is discarded. TTL prevents a data packet form circulating indefinitely.

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