Token Passing
Token passing is a network access control method used in computer networks, particularly in token ring and token bus topologies, where a special frame called a token circulates among nodes to grant permission to transmit data. It ensures orderly communication by allowing only the node holding the token to send data, preventing collisions and managing network traffic efficiently. This concept is fundamental in distributed systems and network protocols for achieving deterministic and fair access to shared resources.
Developers should learn token passing when working with legacy systems, industrial networks, or distributed computing environments where deterministic and collision-free communication is critical, such as in manufacturing automation, avionics, or real-time control systems. It is essential for understanding network protocols like IEEE 802.5 (Token Ring) and for designing fault-tolerant systems that require controlled access to shared resources, as it provides a reliable method to avoid data conflicts and ensure predictable performance.