Which of the following statements is true about Scan Zones?

The correct statement regarding Scan Zones is that they can’t overlap in IP address ranges. This means that each defined Scan Zone must have a distinct range of IP addresses to ensure that scans are accurately directed and do not conflict with one another. Overlapping zones could lead to confusion and potential misidentification of scanned assets or duplicate reports due to the same IPs being present in multiple zones.

In a well-structured scanning environment, ensuring that Scan Zones do not overlap maintains clarity in the scanning process and prevents issues that could arise from multiple scanners attempting to scan the same IP addresses at the same time. This care in management allows for improved accuracy and organization within security assessments.

The other statements do not accurately reflect how Scan Zones operate within ACAS. For instance, there is no requirement for each Scan Zone to include all Nessus scanners; different zones may have different scanners based on the specific requirements of the scanned areas. Additionally, Scan Zones are not limited to dynamic IP addresses, as they can include both dynamic and static IPs based on the organization's setup. Furthermore, while a single scanner can be assigned to multiple Scan Zones, the emphasis on distinct and non-overlapping IP ranges remains crucial for effective scanning operations.