Network Surveillance refers to the monitoring of computer networks to ensure their security and performance. This process involves tracking data traffic, identifying potential threats, and analyzing user behavior. By observing network activity, organizations can detect unauthorized access, malware, and other security breaches. Additionally, Network Surveillance helps in optimizing network resources and improving overall efficiency. Tools and software are used to gather data on network performance, allowing administrators to troubleshoot issues and enhance user experience. Overall, it plays a crucial role in maintaining the integrity and reliability of digital communication systems.