IP

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• IP is connectionless because it treats each packet of information independently.

• It is unreliable because it does not guarantee delivery, meaning, it does not require acknowledgments from the sending host, the receiving host, or intermediate hosts.

• IP provides the interface to the network interface level protocols. The physical connections of a network transfer information in a frame with a header and data. The header contains the source address and the destination address. IP uses an Internet datagram that contains information similar to the physical frame. The datagram also has a header containing Internet Protocol addresses of both source and destination of the data.