Write a Note on Bus and Ring Topology
Introduction
Network topology defines the physical arrangement of devices and cables in a network. Bus and Ring are two important physical topologies used in computer networks.
Bus Topology
Bus topology uses a single main cable called the backbone to connect all devices in the network. Every device is attached to this central cable, and data travels through it in both directions. Terminators are placed at both ends of the cable to prevent signal reflection.
It is simple and cost-effective, making it suitable for small networks. However, if the backbone cable fails, the entire network stops working. It is also difficult to troubleshoot in large setups.
Advantages
- Easy to install
- Low cost
- Requires less cable
Disadvantages
- Backbone failure affects whole network
- Limited cable length
- Difficult fault detection
Ring Topology
In ring topology, devices are connected in a circular structure where each device is connected to two other devices. Data travels in one direction around the ring until it reaches its destination.
It provides organized data flow and reduces data collision. However, if one device or connection fails, the entire network may be affected. It is also harder to expand compared to star topology.
Advantages
- No data collision
- Equal access for all devices
- Organized communication
Disadvantages
- Failure of one device affects network
- Difficult to expand
- Maintenance is complex
Conclusion
Bus topology is simple and low-cost but less reliable. Ring topology provides better data flow control but can fail if any single connection breaks.
Viva Questions with Answers
1. What is a backbone cable?
It is the main cable in bus topology to which all devices are connected.
2. How does data travel in ring topology?
Data travels in one direction around the ring.
3. What happens if the backbone fails in bus topology?
The entire network stops working.
4. Which topology reduces data collision?
Ring topology.
5. Which topology is cheaper?
Bus topology.