A networking protocol that uses a token-passing method to control access to the network.
Description
Token Ring is a LAN (Local Area Network) technology developed by IBM in the 1980s. It operates on a ring topology, where devices are connected in a closed loop. Each device on the network must pass a special data packet, known as a 'token,' to transmit data. Only the device that holds the token can send messages, which helps to prevent data collisions and ensures orderly communication. In a typical Token Ring setup, the network can support up to 255 devices, with a maximum data transfer rate of 16 Mbps. Although it was popular in business environments for its reliability and predictable performance, Token Ring has largely been replaced by Ethernet technology due to cost and flexibility considerations. However, understanding Token Ring is crucial for cybersecurity professionals, as legacy systems may still be in use. Security measures for Token Ring networks include monitoring token circulation and implementing strong access controls to prevent unauthorized access to the network.
Examples
- IBM's Token Ring network was widely used in corporate environments during the 1990s.
- Some educational institutions implemented Token Ring for campus networking before transitioning to Ethernet.
Additional Information
- Token Ring networks are less susceptible to network collisions compared to Ethernet due to the token-passing mechanism.
- While Token Ring technology is outdated, cybersecurity teams may encounter it in legacy systems that require specific security protocols.