Module 07 · Section 1.3.1
Topologies
In a Star topology, all devices connect individually to a central switch or hub. All traffic passes through it.
- ✓If one cable fails, only that device is affected.
- ✓Easy to add new devices without disrupting others.
- ✗If the central switch fails, the entire network goes down.
- ✗Requires more cabling and an additional cost for the switch.
⚠ Examiner Warning: Star Failure
In a star, if one cable breaks, only that device loses connection. The entire network only fails if the switch fails.
In a Mesh topology, every device connects to every other device directly. High redundancy.
- ✓Highly robust — no single point of failure.
- ✓Self-healing — data finds alternative paths.
- ✗Extremely expensive to set up due to vast cabling.
- ✗Complex to configure as the network grows.
| Feature | Star | Mesh |
|---|---|---|
| Failure Point? | Yes (switch) | No |
| Cabling cost | Moderate | Very high |
| Robustness | Medium | Very high |
Mode: Star Topology
Star Topology: All devices connect to a central switch