Ring Topology

Ring Topology

What is Ring Topology?

Devices connect in a closed loop (ring). Each device connects to exactly two other devices, forming a continuous circular pathway. Data travels in one direction around the ring.

How It Works:

• Circular connection: Each device has two neighbors
• Token passing: A special "token" circulates; only the device with the token can transmit
• Unidirectional: Data travels in one direction (clockwise or counterclockwise)
• Data regeneration: Each device receives, regenerates, and forwards data

Ring Topology Advantages:

• No collisions: Token system prevents data collisions
• Equal access: All devices get fair access to network
• Predictable performance: Consistent performance under heavy load
• Moderate cabling: Less cable than star, more than bus

Ring Topology Disadvantages:

• Single point of failure: If one device or cable fails, ring breaks and network fails
• Difficult to troubleshoot: Must locate exact break in the ring
• Adding devices disrupts network: Must break ring to add new device
• Slower for small data: Data must pass through multiple devices
• Largely obsolete: Replaced by star in modern networks

Historical Note:

Ring topology was used in IBM Token Ring networks (1980s-1990s) but has been replaced by switched Ethernet (star topology) in modern networks.