Network Segmentation is creating sub-networks within a corporate, enterprise or other large network. Network segmentation allows for the containment of malware and other threats. This can also be very beneficial to the efficiency of a networks performance. Network segmentation is a prescribed requirement for networks containing Payment Card Industry data (PCI). Network segmentation is an important cybersecurity protective measure which is usually part of any robust defense-in-depth cybersecurity program.
Source: Network Segment Definition”. 2 October 2005.