What is network segmentation?

Network segmentation refers to the practice of dividing a larger network into smaller, more manageable sections or segments. This method is utilized to enhance both performance and security. By isolating different areas of the network, it helps to contain potential security breaches and reduces the risk of unauthorized access, as attackers would have a more challenging time moving through segmented networks.

In terms of performance, segmentation can reduce congestion by limiting the size of broadcast domains and allowing for more efficient data flow. For example, critical servers can be placed on separate segments to minimize the impact of high traffic from less important areas of the network. Therefore, network segmentation not only bolsters security by creating barriers but also optimizes the overall efficiency of network traffic management.

The other options either misinterpret the concept of network segmentation or are too narrow in scope, which is why they do not effectively represent the definition or purpose of network segmentation in a modern networking context.