TCP/IP protocol redundancy

If one the hops becomes not available during transmission, the destination host will see that some information is missing. It will see that some TCP packets are missing during reconstructing phase of original message. It will send a request to re-send that missing information data to sending host, therefore full message can be reconstructed.

TCP protocol has redundancy built into it.

Often TCP protocol will do 5 attempts to resend missing data before giving-up.

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