In the Security Onion architecture, which tool is known as a network traffic analysis tool?

In the Security Onion architecture, which tool is known as a network traffic analysis tool?

• A. Zeek
• B. CapME
• C. Wazuh
• D. Nessus

Answer: (A)

In Security Onion, the network traffic analysis function is fulfilled by Zeek, a framework that passively observes and deeply analyzes network traffic. It doesn’t rely on signature matching alone; instead it parses a wide range of protocols, tracks connections, and produces rich logs (such as connection, DNS, HTTP, and more) that give you contextual insight into what’s happening on the network. This protocol-aware view helps detect subtle or high-volume activity that a simple IDS rule might miss, and it complements other sensors to provide a fuller picture of network security. CapME is a PCAP capture and export tool, useful for pulling traffic for offline analysis, but it’s not the primary network analysis engine. Wazuh focuses on host-based security monitoring and log analysis, not on analyzing network traffic in real time. Nessus is a vulnerability scanner used to assess hosts for known weaknesses, not a traffic analysis tool.

In Security Onion, the network traffic analysis function is fulfilled by Zeek, a framework that passively observes and deeply analyzes network traffic. It doesn’t rely on signature matching alone; instead it parses a wide range of protocols, tracks connections, and produces rich logs (such as connection, DNS, HTTP, and more) that give you contextual insight into what’s happening on the network. This protocol-aware view helps detect subtle or high-volume activity that a simple IDS rule might miss, and it complements other sensors to provide a fuller picture of network security.

CapME is a PCAP capture and export tool, useful for pulling traffic for offline analysis, but it’s not the primary network analysis engine. Wazuh focuses on host-based security monitoring and log analysis, not on analyzing network traffic in real time. Nessus is a vulnerability scanner used to assess hosts for known weaknesses, not a traffic analysis tool.