As networks grow larger and more complex, managing traffic and maintaining security becomes more challenging. In IB Computer Science, this problem is addressed through network segmentation. Students are expected to understand what network segmentation is, how it works, and why organisations use it.
Network segmentation is not just a technical detail — it has direct implications for performance, security, and reliability, all of which are examined conceptually in IB questions.
What Is Network Segmentation?
Network segmentation is the process of dividing a network into smaller, separate sections.
Each segment:
- Contains a subset of devices
- Has controlled communication with other segments
- Can be managed independently
Instead of all devices sharing one large network, segmentation creates logical or physical boundaries within it.
Why Networks Are Segmented
Networks are segmented to:
- Improve performance
- Increase security
- Simplify management
- Reduce the impact of failures
In a single, unsegmented network:
- All devices share bandwidth
- Broadcast traffic increases
- Security risks spread more easily
Segmentation addresses these problems.
Performance Benefits of Network Segmentation
One major benefit of segmentation is reduced network congestion.
When a network is segmented:
