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Quake II Master Server
Ports 27901 through 27910 are utilized by id Software's Quake II master server for coordinating multiplayer game sessions. These ports enable clients to discover active game servers and facilitate connections, primarily over UDP, to support the rapid exchange of game state information necessary for seamless multiplayer gameplay..
The Quake II master server operates over a range of UDP ports, typically from 27901 through 27910. This collection of ports allows game clients to query the master server for a list of available game servers hosting Quake II matches. Clients send request packets, and the master server responds with server addresses, enabling players to quickly find active games.
Communication primarily leverages the UDP protocol to minimize latency, which is crucial for real-time multiplayer interactions. The UDP-based design reduces overhead and accommodates the low-latency needs of first-person shooter games. Although TCP is not typically used on these ports, UDP packets enable fast-paced data exchange crucial for gameplay discovery.
This server infrastructure supports the foundational matchmaking layer within the Quake II ecosystem. It serves as a directory and not as a relay for the actual gameplay data, which happens on different server ports dedicated to hosting the matches themselves.