Isa 62443 Ic33 - All Study Guide Rated A+

Vulnerability Assessment {Ans: A process of identifying, quantifying, and prioritizing system vulnerabilities. It uses various tools and techniques to identify potential weaknesses that need to be addressed, providing insights into the system's security gaps.}ZCR 1: Identify the System Under Consideration (SUC) - Purpose and Tools {Ans: The SUCs are identified for Cybersecurity analysis and include all IACS assets for a complete automation solution. Tools like system inventory, architecture diagrams, network diagrams and dataflows are used to determine and illustrate the SUC's assets.}What is step 6 of the IACS Cybersecurity Life Cycle (Develop & Implement Phase)? {Ans: Installation, commissioning and validation of Cybersecurity countermeasures}Achieved SLs (SL-A) {Ans: Actual level of security for a particular system measured after a system design is available or in place. Used to determine of the security system is meeting the goals set in the SL-Ts}ZCR 5.4 Determine unmitigated likelihood {Ans: Evaluating each threat to establish the likelihood of it materializing without considering any existing countermeasures, hence the term 'unmitigated'. This can be done objectively or subjectively, qualitatively or quantitatively, and can be expressed generally or mathematically (e.g., as a probability or a frequency over a given time period). This step is