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# UDP Protocol UDP (User Datagram Protocol) is a simple, connectionless transport layer protocol used for transmitting data over a network. Unlike (#), UDP does not provide reliability, ordering, or flow control, but it has the characteristics of low latency and high efficiency, making it suitable for applications that require real-time performance. * * * ## How UDP Works UDP is a connectionless protocol, where clients and servers can send data without establishing a connection. Its core function is to transmit data packets quickly. ### 1. **UDP Packet Structure** A UDP packet consists of the following parts: 1. **Source Port**: The port number of the sender. 2. **Destination Port**: The port number of the receiver. 3. **Length**: The total length of the packet (including header and data). 4. **Checksum**: Used to detect if the packet is corrupted (optional). 5. **Data**: The actual data being transmitted. !(#) * * * ### 2. **UDP Data Transmission** !(#) * The client sends UDP packets directly to the server. * The server receives UDP packets but does not send acknowledgment information. * * * ## Key Features of UDP 1. **Connectionless**: * No need to establish a connection, data can be sent directly. 2. **Unreliable**: * Does not guarantee packet delivery, order, or integrity. 3. **Low Latency**: * Since no connection establishment and acknowledgment are required