Network Testing is the process of evaluating the performance, reliability, and security of a computer network. It involves various techniques to identify issues such as slow connections, data loss, or vulnerabilities that could be exploited by attackers. By simulating different scenarios, network testing helps ensure that the network can handle expected traffic and functions correctly under various conditions. The testing can be performed using specialized tools and software that analyze network components like routers, switches, and firewalls. Regular network testing is essential for maintaining optimal performance and safeguarding sensitive information, making it a critical practice for businesses and organizations.