One of the header fields in an IP datagram is the Time To

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One of the header fields in an IP datagram is the Time To Live (TTL) field. Which of the following statements best explains the need for the field?

1. It can be used to prioritize packets
2. It can be used to reduce delays
3. It can be used to optimize throughput
4. It can be used to prevent packet looping

Correct Option: D

Time to live (TTL) is a limit on the period of time or transmissions in computer and computer network technology that a unit of data (e.g., a packet) can experience before it should be discarded. If the limit is not defined then the packets can go into an indefinite loop. The packet is discarded when the Time to live field reaches 0 to prevent looping.