Glossary term
What is UDP (User Datagram Protocol)?
UDP stands for User Datagram Protocol.
In DevOps
Fast delivery with no guarantee. Used for video calls, DNS lookups and gaming, where speed beats perfection.
Learn it properly · DevOpsLesson 2: Networking Basics: IP, Ports, TCP/UDP and FirewallsHow a browser request actually finds and reaches your server. The layer Vercel hides completely, and the one you must understand before EC2 makes any sense.In System Design
Fast delivery with no guarantees. Lost data isn't resent. Example: Shouting across a room: fast, but some words may be missed. Used by video calls and games.
Learn it properly · System DesignLesson 2: TCP vs UDP: How Data Actually TravelsThe internet loses, duplicates and reorders packets. TCP promises every byte in order and pays for it in round trips; UDP just sends and lets the app cope. How each works, and how QUIC takes the best of both.In Networking for Developers
A simple transport protocol that sends separate messages with no connection, no retransmission and no ordering.
Learn it properly · Networking for DevelopersLesson 2: TCP and UDP: Connections, Reliability and CongestionThe three-way handshake, sequence numbers, retransmission, flow and congestion control, UDP, and when each is used. Captured with real packet tools.