Guide on Network Segmentation

What is Network Segmentation?
Network segmentation is a strategy that divides a network into smaller independent segments or subnets. Each segment is a separate network and operates independently from the others.

Why it is important?
Network segmentation is crucial for the security and performance of a network for several reasons:

• Security: By separating a network into segments, if one part of the network is compromised, it will not affect the others.
• Performance: Network segmentation helps in reducing traffic congestion, resulting in improved network performance.
• Isolation: Network segmentation allows isolating issues to specific segments without impacting the entire network.

How it works?
Network segmentation can be achieved through different methods like VLANs, subnetting, firewalls, and by physically separating networks. Depending of the method used, specific protocols and rules are applied to control the traffic between the segments.

Exam Tips: Answering Questions on Network Segmentation
Here are some tips for answering questions about network segmentation in an exam:

• Understand the concept well, don’t just memorize definitions.
• Demonstrate an understanding of why network segmentation is essential - remember the importance of security and performance.
• Be prepared to describe how to implement network segmentation, including the use of VLANs, subnetting, and firewalls.
• Practice explaining scenarios where network segmentation would be beneficial.
• A clear understanding of protocols related to network segmentation can also be useful.