What is network segmentation?

Network segmentation refers to the practice of dividing a larger computer network into smaller, manageable parts or segments. This approach enhances both performance and security within the network. By segmenting the network, traffic can be controlled and managed more efficiently, which can lead to improved performance as data packets have shorter paths to travel and less congestion can occur.

From a security perspective, segmentation limits the potential impact of a security breach. If one segment of the network is compromised, the attacker would find it more challenging to access other segments. This isolation helps to contain potential threats and reduces the overall attack surface of the network.

The other options do not effectively capture the essence of network segmentation. Adding more devices does not inherently improve performance or security; instead, it could lead to more congestion. Connecting all networks into one large network creates a single point of failure and makes management and security more complex, which could actually degrade both performance and security. Implementing additional firewalls enhances security, but it does not directly relate to the concept of dividing the network into segments. Overall, network segmentation is a strategic approach aimed at enhancing both the efficiency and security of computer networks.