What is the main purpose of network segmentation?

The main purpose of network segmentation is to enhance performance by reducing collision domains. By dividing a larger network into smaller, manageable segments, you minimize the number of devices within each segment that can communicate simultaneously. This leads to a reduction in collisions, which can occur when two devices attempt to send data over the same network medium at the same time.

In Ethernet networks, for instance, a collision will halt transmissions until nodes can successfully communicate without interference. When the network is segmented, each collision domain is isolated, leading to improved overall performance. Devices in one segment do not interfere with those in another, allowing for more efficient use of network resources and reducing the likelihood of network congestion.

This separation also allows for better management of broadcast traffic, as broadcasts are only sent within their respective segments. Enhanced performance through reduced collision domains is a key aspect of effective network design, making segmentation a widely adopted practice in both enterprise and smaller network environments.