| Definition | All devices share a single backbone cable. | Every device is connected to every other device (fully or partially). | Devices are connected in a circular loop. | All devices connect to a central hub/switch. |
| Structure | Linear | Interconnected | Circular | Centralized |
| Central Device | Not Required | Not Required | Not Required | Hub/Switch Required |
| Communication Path | Shared backbone | Dedicated links | Token/Data circulates in ring | Through central hub/switch |
| Data Transmission | Broadcast | Point-to-Point | Token Passing (usually) | Point-to-Point |
| Collision | High | No Collision | No Collision | Very Low (Switch), Possible (Hub) |
| Speed | Slow | Very Fast | Moderate | Fast |
| Performance Under Heavy Load | Poor | Excellent | Good | Good to Excellent |
| Reliability | Low | Very High | Moderate | High |
| Fault Tolerance | Poor | Excellent | Moderate | Good |
| Single Point of Failure | Backbone cable | None | Any node/cable may affect ring | Hub/Switch |
| Failure of One Node | Usually no effect | No effect | May break entire ring (unless dual ring) | No effect |
| Failure of Main Cable | Entire network fails | Other paths available | Entire ring disrupted | Hub failure stops network |
| Scalability | Limited | Difficult | Moderate | Excellent |
| Installation | Easy | Very Difficult | Moderate | Easy |
| Configuration Complexity | Low | Very High | Medium | Low |
| Maintenance | Difficult | Difficult | Moderate | Easy |
| Cable Requirement | Least | Maximum | Moderate | More than Bus |
| Cost | Lowest | Highest | Medium | Medium |
| Expansion | Difficult | Very Difficult | Moderate | Easy |
| Security | Low | Very High | Medium | High |
| Troubleshooting | Difficult | Difficult | Moderate | Easy |
| Data Privacy | Poor | Excellent | Good | Good |
| Network Traffic | Shared | Dedicated | Sequential | Managed by Switch |
| Bandwidth Sharing | Shared by all | Dedicated per link | Shared sequentially | Dedicated per port (Switch) |
| Latency | High | Very Low | Moderate | Low |
| Redundancy | None | Maximum | Low | Depends on switch design |
| Most Suitable For | Small temporary LAN | Military, Banking, Data Centers | MAN, Token Ring Networks | Modern LANs |
| Example | Early Ethernet (10Base2, 10Base5) | Internet Backbone, Military Networks | IBM Token Ring | Office, School, Home Networks |
| Current Usage | Rare | Specialized | Rare | Most Common |