Which tool is specifically designed to analyze network traffic?

The tool specifically designed to analyze network traffic is a protocol analyzer. This type of software or hardware captures and inspects data packets transmitted over a network, allowing users to observe the flow of information, diagnose issues, and troubleshoot network performance. Protocol analyzers can dissect the packets according to their protocols, offering insights into the data's structure, source, destination, and other relevant details.

While firewalls play a crucial role in monitoring and controlling incoming and outgoing network traffic, they are primarily focused on enforcing security rules rather than specifically analyzing data packets. Antivirus software is designed to detect and mitigate malware threats rather than analyze network traffic itself. Lastly, backup software is intended for data protection and recovery, ensuring that critical information is stored safely and can be restored when necessary, but it does not provide the functionalities required for analyzing network traffic. Hence, a protocol analyzer is the best fit for the purpose of analyzing network traffic.