Overview
In a ring topology, data travels in one direction (or sometimes two) around the ring. Each node acts as a repeater, strengthening the signal before sending it to the next node.
Key Concepts
- Token Passing: A common method for controlling access to the ring (e.g., Token Ring), where only the node holding a 'token' can transmit.
- Dual Ring: Uses two rings for redundancy; if one fails, the other can take over.
Advantages
- No Collisions: Data flows in an orderly fashion.
- Performance: Can handle high traffic better than a bus topology.
Disadvantages
- Vulnerability: In a single ring, if one node or cable fails, the entire network goes down.
- Difficulty: Adding or removing devices requires breaking the ring.