A security officer wants to implement a vulnerability scanning program. The officer is uncertain of the state of vulnerability resiliency within the organization’s large IT infrastructure. What would be the BEST approach to minimize scan data output while retaining a realistic view of system vulnerability?

In a large, complex IT environment where the vulnerability posture is unknown, scanning every system would generate an overwhelming amount of data, making analysis impractical. The best approach is to scan a representative sample of the systems. This statistical sampling method allows the security officer to gain a realistic and manageable overview of the organization's vulnerability landscape. The sample should include a cross-section of different system types, operating systems, and functions (e.g., web servers, databases, workstations) to ensure the results can be reasonably extrapolated to the entire infrastructure, thus minimizing initial data output while retaining a realistic view.

B. Scanning during off-hours addresses the performance impact of scans on the network, not the volume of the resulting data.
C. Decreasing the vulnerabilities checked in the scan tool would create a deliberately incomplete and unrealistic view, defeating the purpose of the assessment.
D. Filtering scan output is a post-scan activity. It does not minimize the initial data generated by the scan itself, which is the core problem to be solved.

1. NIST. (2008). Special Publication 800-115, Technical Guide to Information Security Testing and Assessment. Section 3.3, "Assessment Methods," discusses the need for proper scoping. For large-scale assessments, sampling is a standard technique to make the process manageable.

2. Swan, M. (2010). SANS Institute InfoSec Reading Room - How to Build a Vulnerability Management Program. p. 5. The paper discusses discovery and asset prioritization, implying that in large environments, focus must be placed on representative or critical systems first.

3. Kim, D., & Solomon, M. G. (2016). Fundamentals of Information Systems Security (3rd ed.). Jones & Bartlett Learning. Chapter 10, "Security Operations," describes vulnerability scanning and notes that for large organizations, a phased or sampled approach is often necessary for initial baseline creation.