Which tool is effective for analyzing bandwidth usage on a network?

A network analyzer is specifically designed to monitor and analyze network traffic, making it an effective tool for assessing bandwidth usage. It captures and inspects packets of data traveling over the network, allowing administrators to analyze various parameters such as traffic volume, packet loss, and errors. This provides detailed insights into how bandwidth is being utilized, which can help identify bottlenecks or misconfigurations that could be affecting network performance.

While routers manage and direct data traffic within a network, they do not typically provide the same level of detailed analysis as a network analyzer. Firewalls focus on security by controlling incoming and outgoing network traffic based on predetermined security rules, while DNS servers translate domain names into IP addresses, facilitating network communication. Neither of these options is designed for in-depth analysis of bandwidth usage like a network analyzer.