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Udp checksum c program2/4/2023 If not utilised, a value of zero is added. It denotes the port of the sending process and can be assumed to be the port that should address a reply in the absence of any other data. Source Port is an optional field when it is relevant. The UDP header is classified into the following 16-bit fields. This makes it feasible for the UDP software at the destination to deliver the message to the correct application program and for the application program to send a reply. For example, UDP provides a protocol port to distinguish between multiple programs implemented on a single deviceĮach UDP message includes both a destination port number and a source port number. UDP is also used by application of the typical transmit of a small amount of data at one time. For example, audio or video broadcasting used UDP. This represents that the packet's arrival is not guaranteed, and also there is no guarantee for the correct sequencing of forwarded packets.Īn application that does not require an acknowledgement of data receipt. User Datagram Protocol (UDP) provides a connectionless packet service that offers unreliable 'best effort' delivery.
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