A Network Analyzer is a tool used to monitor and analyze data traffic within a computer network. It helps identify issues such as bottlenecks, unauthorized access, and performance problems by capturing and inspecting data packets. This information is crucial for network administrators to ensure efficient and secure network operations. These devices can be hardware-based or software-based, and they often provide visual representations of network activity. Common features include real-time monitoring, traffic analysis, and reporting capabilities. Popular examples of Network Analyzers include Wireshark and SolarWinds, which are widely used in both small and large networks.