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NEW QUESTION # 48
Which of the following refers to internal rules that govern how an organization protects critical system
resources?
Available Choices (select all choices that are correct)
- A. Formal guidance
- B. Security policy
D- Code of conduct - C. Legislation
Answer: B
NEW QUESTION # 49
Which characteristic is MOST closely associated with the deployment of a demilitarized zone (DMZ)?
Available Choices (select all choices that are correct)
- A. Level 4 systems must use the DMZ to communicate with Level 3 and below.
- B. Level 0 can only interact with Level 1 through the firewall.
- C. Internet access through the firewall is allowed.
- D. Email is prevented, thereby mitigating the risk of phishing attempts.
Answer: A
NEW QUESTION # 50
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
- A. Business systems automatically update.
- B. Many more approvals are required.
- C. Overtime pay is required for technicians.
- D. Patching a live automation system can create safety risks.
Answer: D
NEW QUESTION # 51
Which policies and procedures publication is titled Patch Manaqement in the IACS Environment?
Available Choices (select all choices that are correct)
- A. ISA-TR62443-1-4
- B. ISA-62443-3-3
- C. ISA-TR62443-2-3
- D. ISA-62443-4-2
Answer: C
NEW QUESTION # 52
Which is a common pitfall when initiating a CSMS program?
Available Choices (select all choices that are correct)
- A. Organizational lack of communication
- B. Failure to relate to the mission of the organization
- C. Immediate jump into detailed risk assessment
- D. Insufficient documentation due to lack of good follow-up
Answer: B
NEW QUESTION # 53
Which is the BEST deployment system for malicious code protection?
Available Choices (select all choices that are correct)
- A. Application whitelistinq (AWL) OD.
- B. IACS protocol converters
- C. Network segmentation
- D. Zones and conduits
Answer: D
NEW QUESTION # 54
Which is the PRIMARY objective when defining a security zone?
Available Choices (select all choices that are correct)
- A. All assets in the zone must be at the same level in the Purdue model.
- B. All assets in the zone must be physically located in the same area.
- C. All assets in the zone must be from the same vendor.
- D. All assets in the zone must share the same security requirements.
Answer: D
NEW QUESTION # 55
Which of the following is a recommended default rule for IACS firewalls?
Available Choices (select all choices that are correct)
- A. Allow all traffic by default.
- B. Allow IACS devices to access the Internet.
- C. Allow traffic directly from the IACS network to the enterprise network.
- D. Block all traffic by default.
Answer: D
NEW QUESTION # 56
How many element qroups are in the "Addressinq Risk" CSMS cateqorv?
Available Choices (select all choices that are correct)
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 57
Which is an important difference between IT systems and IACS?
Available Choices (select all choices that are correct)
- A. Routers are not used in IACS networks.
- B. The IACS security priority is integrity.
- C. IACS cybersecurity must address safety issues.
- D. The IT security priority is availability.
Answer: C
NEW QUESTION # 58
Which of the following are the critical variables related to access control?
Available Choices (select all choices that are correct)
- A. Account management and password strength
- B. Account management and monitoring
- C. Reporting and monitoring
- D. Password strength and change frequency
Answer: A
NEW QUESTION # 59
Which is a PRIMARY reason why network security is important in IACS environments?
Available Choices (select all choices that are correct)
- A. PLCs under cyber attack can have costly and dangerous impacts.
- B. PLCs are inherently unreliable.
- C. PLCs use serial or Ethernet communications methods.
- D. PLCs are programmed using ladder logic.
Answer: A
NEW QUESTION # 60
Which of the following is an example of separation of duties as a part of system development and
maintenance?
Available Choices (select all choices that are correct)
- A. Developers write and then test their own code.
- B. Design and implementation are performed by the same team.
- C. Configuration settings are made by one party and self-reviewed using a checklist.
- D. Changes are approved by one party and implemented by another.
Answer: D
NEW QUESTION # 61
What is the name of the protocol that implements serial Modbus over Ethernet?
Available Choices (select all choices that are correct)
- A. MODBUS/TCP
- B. MODBUS/Plus
- C. MODBUS/Ethernet
- D. MODBUS/CIP
Answer: A
NEW QUESTION # 62
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. ISO 27001
- B. NIST SP800-82
- C. API 1164
- D. ISA-62443 (EC 62443)
Answer: C
NEW QUESTION # 63
What does Layer 1 of the ISO/OSI protocol stack provide?
Available Choices (select all choices that are correct)
- A. Framing, converting electrical signals to data, and error checking
- B. Data encryption, routing, and end-to-end connectivity
- C. The electrical and physical specifications of the data connection
- D. User applications specific to network applications such as reading data registers in a PLC
Answer: C
NEW QUESTION # 64
Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)
- A. All components in a large or complex system should be in the same security zone.
- B. Security zones should contain assets that share common security requirements.
- C. Security zones should align with physical network segments.
- D. Assets within the same logical communication network should be in the same security zone.
Answer: B
NEW QUESTION # 65
Using the risk matrix below, what is the risk of a medium likelihood event with high consequence?
- A. Option B
- B. Option C
- C. Option A
- D. Option D
Answer: A
NEW QUESTION # 66
At Layer 4 of the Open Systems Interconnection (OSI) model, what identifies the application that will handle a
packet inside a host?
Available Choices (select all choices that are correct)
- A. ATCP/UDP application ID
- B. ATCP/UDP port number
- C. A TCP/UDP host ID
- D. ATCP/UDP registry number
Answer: B
NEW QUESTION # 67
What do packet filter firewalls examine?
Available Choices (select all choices that are correct)
- A. The packet structure and sequence
- B. Only the source, destination, and ports in the header of each packet
- C. The relationships between packets in a session
- D. Every incoming packet up to the application layer
Answer: B
NEW QUESTION # 68
What are the connections between security zones called?
Available Choices (select all choices that are correct)
- A. Firewalls
- B. Conduits
- C. Tunnels
- D. Pathways
Answer: B
NEW QUESTION # 69
Electronic security, as defined in ANSI/ISA-99.00.01:2007. includes which of the following?
Available Choices (select all choices that are correct)
- A. Personnel, policies, and procedures related to the security of computers, networks. PLCs, and other
programmable configurable components of the system - B. Security guidelines for the proper configuration of IACS PLCs and other programmable configurable
components of the system - C. Computers, networks, operating systems, applications, and other programmable configurable
components of the system - D. Security guidelines for the proper configuration of IACS computers and operating systems
Answer: A
NEW QUESTION # 70
What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?
- A. Protocol
- B. Transport
- C. User
- D. Control
Answer: B
NEW QUESTION # 71
Which factor drives the selection of countermeasures?
Available Choices (select all choices that are correct)
- A. Foundational requirements
- B. System design
- C. Security levels
- D. Output from a risk assessment
Answer: D
NEW QUESTION # 72
Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)
- A. System Safety Analysis(SSA)
- B. Failure Mode and Effects Analysis
- C. Process Hazard Analysis (PHA)
- D. Job Safety Analysis(JSA)
Answer: C
NEW QUESTION # 73
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