What tool can be used to determine if packets captured by an IDS are genuinely malicious?

• A. Protocol analyzer
• B. Packet injector
• C. Vulnerability scanner
• D. Network miner

Answer: (A)

Examining captured traffic to confirm whether IDS alerts reflect real malicious activity relies on deep packet inspection and decoding. A protocol analyzer does exactly that: it captures and decodes network packets, letting you view headers, flags, and payloads, and is able to reassemble streams to see the actual data exchanged. By applying filters and inspecting the content, you can spot signs of attack such as unusual payloads, malformed packets, anomalous protocol behavior, or known exploit strings, and determine if the traffic aligns with legitimate use or indicates an intrusion. This hands-on view provides evidence beyond the IDS alert itself, helping you verify the true nature of the activity. In contrast, a packet injector generates traffic for testing, a vulnerability scanner looks for weaknesses on hosts rather than analyzing traffic, and network miner focuses on extracting artifacts from traffic rather than assessing maliciousness of the packets.