What are the continuous processes activities of the IACS Cybersecurity Life Cycle?
- ANSWERS-Cybersecurity Management System: Policies, Procedures, Training &
Awareness, Periodic Cybersecurity Audits
What must be done before an assessment can be started? - ANSWERS-Create a
Project Plan
ID Steps of the Project to perform the assessment
ID the System Under Assessment
System Under Consideration (SUC) - ANSWERS-The system or systems within an
Industrial Automation and Control System environment that are being evaluated
or designed for security enhancements.
System Under Assessment (SUA) - ANSWERS-The system that is being evaluated
for compliance with standards.
What are some required information gathering items before the assessment can
begin? - ANSWERS-Goals of the Assessment
IACS asset inventory
Understanding of the IACS
,Regulations, requirements, and governance of relevance (Government, Industry,
Company)
Architecture diagrams
Configuration Files
Known vulnerabilities
Define roles and responsibilities
Establish training requirements
System Architecture Diagrams - ANSWERS-Depiction of system components, their
connectivity, and physical locations.
Physical System Architecture Diagram - ANSWERS-A diagram that provides a
visual representation of the physical components within a system and their
interconnections. It focuses on hardware elements such as servers, network
devices, control systems, and terminals, showing how these components are
arranged and connected.
Functional System Architecture Diagram - ANSWERS-A diagram that describes the
functions of a system and their relationships without focusing on physical details.
It presents a logical view of the system, emphasizing software elements, data
flows, and interactions between different functions or modules within the system.
(True/False) IACS functionality should be graphically represented on at least one
IACS Architecture drawing - ANSWERS-True
,What is the purpose of assigning a Target Security Level (SL-T) during the Assess
phase of ICS security implementation? - ANSWERS-To determine the existing
vulnerabilities of the system.
What happens during the Develop & Implement phase of ICS security
implementation? - ANSWERS-Countermeasures are implemented to meet the
Target Security Level (SL-T).
What is the primary goal of the Maintain phase in ICS security implementation? -
ANSWERS-To ensure the Achieved Security Level (SL-A) is equal to or better than
the Target Security Level (SL-T).*
What is phase 1 of the IACS Cybersecurity Life Cycle? - ANSWERS-Assess
What is phase 2 of the IACS Cybersecurity Life Cycle? - ANSWERS-Develop &
Implement
What is phase 3 of the IACS Cybersecurity Life Cycle? - ANSWERS-Maintain phase
What is step 1 of the IACS Cybersecurity Life Cycle (Assess Phase)? - ANSWERS-
High-Level Cyber Risk Assessment
What is step 2 of the IACS Cybersecurity Life Cycle (Assess Phase)? - ANSWERS-
Allocation of IACS Assets to Security Zones or Conduits
, What is step 3 of the IACS Cybersecurity Life Cycle (Assess Phase)? - ANSWERS-
Detail Cyber Risk Assessment
What is step 4 of the IACS Cybersecurity Life Cycle (Develop & Implement Phase)?
- ANSWERS-Cybersecurity Requirements Specification
What is step 5 of the IACS Cybersecurity Life Cycle (Develop & Implement Phase)?
- ANSWERS-Design and engineering of Cybersecurity countermeasures
What is step 6 of the IACS Cybersecurity Life Cycle (Develop & Implement Phase)?
- ANSWERS-Installation, commissioning and validation of Cybersecurity
countermeasures
What is step 7 of the IACS Cybersecurity Life Cycle (Maintain)? - ANSWERS-
Cybersecurity Maintenance, Monitoring and Management of Change
What is step 8 of the IACS Cybersecurity Life Cycle (Maintain)? - ANSWERS-Cyber
Incident Response & Recovery
ISA-95 Functional Layer Level 0 - ANSWERS-The physical process — This level
defines the physical processes showing data flowing from sensors and actuators
into the control level.
ISA-95 Functional Layer Level 1 - ANSWERS-Intelligent devices — Devices in this
level sense and manipule the physical processes. Process, sensors, analyzers,
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