Define "vulnerability assessment."

A vulnerability assessment is accurately described as a systematic evaluation of security weaknesses in an information system. This process involves identifying, quantifying, and prioritizing vulnerabilities within a system to establish an overall security posture. The assessment is crucial for organizations to understand where they may be exposed to risks, determine the potential impact of these vulnerabilities, and identify measures to mitigate those risks.

Conducting a vulnerability assessment typically involves a combination of automated tools and manual testing techniques. It helps organizations prioritize security efforts based on the severity of identified vulnerabilities and formulates a strategy for remediation.

In contrast, the other options do not capture the essence of what a vulnerability assessment entails. A random check of employee computer usage focuses more on compliance and behavior rather than an in-depth analysis of security flaws. An informal discussion about security practices lacks the methodological approach needed to uncover vulnerabilities, and while promoting cybersecurity training is beneficial, it does not directly relate to assessing the strengths and weaknesses of an information system's security measures.