Question

Difficulty: EasyVulnerability Assessment and Security Testing Methods

A security technician is planning a vulnerability assessment for an enterprise segment that includes legacy operational technology (OT) devices highly sensitive to unexpected network traffic. The technician decides to implement passive vulnerability scanning rather than active scanning. Which TWO of the following statements correctly describe the primary characteristics of passive vulnerability scanning? (Select TWO)

  1. It inspects captured network traffic packets in real time without sending active diagnostic probes to host systems.Answer
  2. It significantly reduces the risk of causing service disruption or unexpected system crashes on fragile operational endpoints.Answer
  3. C
    It actively executes intrusive exploitation payloads to verify whether identified vulnerabilities are actionable.
  4. D
    It deploys decoy honeypot resources to inline block and redirect malicious connection attempts.
  5. E
    It injects targeted SQL injection payloads into web applications to evaluate backend database input handling.

Answer

Passive vulnerability scanning inspects existing network traffic packets in real time without transmitting active probes, which significantly reduces the risk of service disruption on sensitive operational systems.
Passive vulnerability scanning operates non-intrusively by sniffing and analyzing network traffic as it traverses the wire. It identifies hosts, protocols, and vulnerabilities based on packet characteristics without generating probe traffic, thereby preserving uptime on fragile endpoints.

Step-by-Step Solution

1
Analyze the scenario constraints and requirements
The target environment contains sensitive legacy devices where active scanning probes might cause crashes or service interruptions.
Selecting passive vulnerability scanning ensures that network assets are assessed without receiving direct network probes.
2
Identify key operational features of passive vulnerability scanning
Passive scanners observe network traffic passively (via SPAN/TAP ports) to identify host operating systems, running services, and known vulnerabilities.
This non-intrusive approach collects vulnerability data from ongoing network communications while eliminating disruption risk.

Key Concept

Passive Vulnerability Assessment Methods
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