As a cybersecurity analyst at IoT Defend, you are working with a large utility company that uses Industrial Control Systems (ICS) in its operational technology (OT) environment. The company has…

Implementing stronger encryption is a remediation control that addresses data-in-transit security, but it cannot be properly targeted or validated without first knowing which devices are vulnerable and what threats exist.

Network segmentation is an important defense-in-depth control, but it is a mitigation strategy rather than a discovery step, and applying it without a prior assessment may still leave unknown vulnerabilities unaddressed within the segmented zone.

Conducting a vulnerability assessment is the foundational first step in any security program because it identifies specific weaknesses, misconfigurations, outdated firmware, and exposed attack surfaces in the IoT devices before any mitigations are applied. Without this discovery phase, security controls may be misapplied or fail to address the actual risks present. In ICS/OT environments, this is especially critical because unknown vulnerabilities in IoT devices can serve as entry points that bridge IT and OT networks, potentially causing physical or operational consequences.

Traditional antivirus software is largely incompatible with most IoT and ICS devices due to constrained hardware resources and proprietary operating systems, making this recommendation technically inappropriate for the described environment.