Why is improving security a key reason for network segmentation?

Improving security is fundamentally tied to network segmentation because it effectively restricts access to sensitive areas of the network. By segmenting a network, administrators can create isolated segments that contain sensitive data, restricted applications, or critical systems. This isolation means that even if a breach occurs in one part of the network, the attackers face additional barriers when trying to access other segments where vital information resides.

For instance, a company may have a separate segment for its financial information and another for operational systems. By enforcing strict access control policies, only authorized personnel can reach certain segments, thereby minimizing the risk of unauthorized access and potential data breaches. This layered security approach is crucial in protecting an organization's valuable assets and sensitive information, making it a foundational practice in modern network security strategy.

In contrast, other options do not adequately connect network segmentation with enhanced security. For instance, simply increasing hardware investments or reducing the number of segments does not directly correlate with improved security; rather, they may focus on efficiency or cost rather than protection. Similarly, while simplifying network management tasks can be a benefit of segmentation, it does not inherently enhance security.