Which of the following describes the purpose of a network analyzer in a modern network?

• A. A device that amplifies wireless signals
• B. Analyzes network traffic and captures packets for analysis
• C. A software firewall that blocks unauthorized traffic
• D. A protocol for secure remote login

Answer: (B)

A network analyzer observes and inspects traffic on a network by capturing packets and analyzing their contents. This allows you to see exactly what data is being sent, in what order, and how it’s formatted, so you can troubleshoot performance issues, understand protocol behavior, and spot anomalies or security threats. The option that matches this purpose most closely describes analyzing network traffic and capturing packets for analysis, which is what a network analyzer does. The other descriptions refer to a device that boosts wireless signals, a firewall that blocks traffic, and a protocol for secure remote login, none of which capture or scrutinize traffic for analysis.