INTERVIEW QUESTIONS PROTOCOLS IP PROTOCOL DETAILS

Question: How a datagram becomes an undeliverable datagram?

Answer: A datagram may become undeliverable, if

1. The destination host is down.
2. The route for the destination host is not found.
3. A network in the route to the destination host is down.
4. The Time To Live (TTL) value of the datagram becomes zero.

A datagram may become undeliverable, if

1. The destination host is down.
2. The route for the destination host is not found.
3. A network in the route to the destination host is down.
4. The Time To Live (TTL) value of the datagram becomes zero. Source: CoolInterview.com

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