Network segmentation is the practice of dividing a computer network into smaller, isolated subnetworks or “segments” to improve security, performance, and manageability. This approach involves implementing various security controls, such as firewalls, routers, and VLANs (Virtual Local Area Networks), to create boundaries between different parts of the network.

The main objectives of network segmentation include:

  1. Security: Segmentation helps limit the impact of security breaches or cyberattacks by containing them within isolated segments. If an attacker gains access to one segment, they would still need to bypass additional security measures to move laterally within the network.
  2. Control: By dividing the network into segments, administrators can enforce stricter access controls and policies tailored to specific segments or user groups. This allows for better control over who can access what resources and services.
  3. Performance: Segmentation can improve network performance by reducing congestion and optimizing traffic flow. By isolating certain types of traffic or applications within dedicated segments, administrators can prioritize critical traffic and allocate resources more efficiently.
  4. Compliance: Many regulatory standards and industry best practices recommend or require network segmentation as part of a comprehensive security strategy. Segmentation helps organizations demonstrate compliance with data protection regulations and security frameworks.

Overall, segmentation is an essential component of network security architecture, helping organizations reduce and mitigate risks, enhance control, and improve the overall resilience of their networks against cyber threats.