How can network segmentation improve security?

Network segmentation enhances security by dividing the overall network into smaller, manageable segments. This approach allows for the implementation of tailored security policies for each segment based on its specific needs and sensitivity levels.

By isolating different areas of the network, organizations can contain potential threats more effectively. For example, if an attacker gains access to one segment, they may be prevented from moving laterally across the network to other segments, where more sensitive data or critical systems reside. Furthermore, segmentation can be a crucial strategy in applying role-based access controls, ensuring that users only access the parts of the network relevant to their functions.

The other options do not directly contribute to improved security in the same way. Increasing the complexity of network devices can actually introduce more risks and potential vulnerabilities if not managed correctly. Reducing the overall size of the network does not inherently enhance security; rather, it's the structure and segmentation that matter. Similarly, limiting the number of users on the network may help manage load but does not address the broader security controls that segmentation accomplishes.