GOOD2USE Knowledge Network PC UDP

GOOD2USE Knowledge Network PC UDP

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User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network. Prior communications are not required in order to set up communication channels or data paths.

UDP uses a simple connectionless communication model with a minimum of protocol mechanisms. It provides checksums for data integrity, and port numbers for addressing different functions at the source and destination of the datagram. There are no handshaking dialogues, and consequently exposes the user's program to any unreliability of the underlying network. There is no guarantee of delivery, ordering, or duplicate protection.
If error-correction facilities are needed at the network interface level, an application may use Transmission Control Protocol (TCP) or Stream Control Transmission Protocol (SCTP) which are designed for this purpose.

UDP is suitable for purposes where error checking and correction are either not necessary or are performed in the application; UDP avoids the overhead of such processing in the protocol stack. Time-sensitive applications often use UDP because dropping packets is preferable to waiting for packets delayed due to retransmission, which may not be an option in a real-time system.

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