IP Protocol

IP is a protocol for sending/receiving data packets between IP hosts. IP operates in a best-effort manner. An IP host just sends data packets to a receiving host, but it does not guarantee the data packets will be delivered to their destinations, nor in order. This means that IP is not a reliable protocol. If needed, reliability must be implemented above the IP layer.

Source: Wang K.C. (2018), Systems Programming in Unix/Linux, Springer; 1st ed. 2018 edition.

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