Modern arcade machines rely on robust networking protocols to deliver seamless multiplayer experiences, online leaderboards, and remote diagnostics. The most commonly used protocols include:

1. TCP/IP (Transmission Control Protocol/Internet Protocol): Ensures reliable data transmission for critical functions like score synchronization and firmware updates.

2. UDP (User Datagram Protocol): Preferred for real-time gameplay due to its low latency, ideal for fast-paced arcade action.

3. HTTP/HTTPS: Used for fetching online content, such as game patches or advertisements, securely.

4. WebSocket: Facilitates persistent connections for live multiplayer interactions and chat features.

5. Proprietary Protocols: Some manufacturers use custom protocols optimized for their hardware to reduce lag.

These protocols enable arcade machines to connect to local networks or the internet, enhancing player engagement and operational efficiency.