UDP
UDP (User Datagram Protocol) is a connectionless transport layer protocol in the Internet Protocol suite that provides a simple, low-overhead method for sending datagrams between applications on networked devices. Unlike TCP, it does not establish a persistent connection, guarantee delivery, or ensure packet ordering, making it faster but less reliable. It is commonly used for time-sensitive applications where speed is prioritized over data integrity, such as video streaming, online gaming, and DNS queries.
Developers should learn and use UDP when building applications that require low latency and can tolerate some data loss, such as real-time communication systems (e.g., VoIP, live video), multiplayer games, or IoT sensor data transmission. It is also essential for protocols like DNS and DHCP, where quick, lightweight exchanges are more important than perfect reliability. Understanding UDP helps in optimizing network performance and choosing the right protocol based on application needs.