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최신 ISA Cybersecurity ISA-IEC-62443 무료샘플문제 (Q192-Q197):

질문 # 192
Which of the following is the BEST reason for periodic audits?
Available Choices (select all choices that are correct)

A. To meet regulations
B. To confirm audit procedures
C. To adhere to a published or approved schedule
D. To validate that security policies and procedures are performing

정답：D

질문 # 193
Which NIST Special Publication focuses specifically on securing Industrial Control Systems (ICS)?

A. SP 800-30
B. SP 800-53
C. SP 800-82
D. SP 800-171

정답：C

설명：
ISA/IEC 62443 recognizes that organizations may align their IACS cybersecurity programs with other authoritative guidance. Within the NIST Special Publications, SP 800-82 is the document specifically dedicated to Industrial Control Systems security.
Step 1: Scope of SP 800-82
SP 800-82 provides guidance tailored to ICS environments, including SCADA, DCS, and PLC-based systems. It addresses availability, safety, and real-time constraints similar to ISA/IEC 62443.
Step 2: Complementary relationship
ISA/IEC 62443 and SP 800-82 are often used together: ISA/IEC 62443 provides auditable requirements, while SP 800-82 provides practical implementation guidance.
Step 3: Why other options are incorrect
* SP 800-30 focuses on risk assessment
* SP 800-53 defines general security controls
* SP 800-171 focuses on protecting CUI in non-federal systems
Therefore, the correct answer is SP 800-82.

질문 # 194
What makes patching in IACS environments particularly complex?

A. The availability of unlimited maintenance windows
B. Patches never require testing before deployment
C. Cyber threats do not affect IACS systems
D. Continuous operations and safety concerns

정답：D

설명：
Patching in Industrial Automation and Control Systems (IACS) is complex primarily due to:
The need to maintain continuous operations
Strict safety and reliability requirements
The risk of introducing unintended consequences through updates
"Unlike IT environments, IACS patching is constrained by the requirement to maintain availability and ensure safety. Patches must be tested in staging environments and applied during maintenance windows to avoid disrupting operations."
- ISA/IEC 62443-2-3:2015, Clause 6.1 - Patch Management Process
This makes patch management a risk-based and carefully scheduled activity, not an automatic or rapid one.
References:
ISA/IEC 62443-2-3:2015 - Clause 6.1
ISA/IEC 62443-2-1:2010 - Clause 4.3.4.3 - Change Management

질문 # 195
What is the purpose of ISO/IEC 15408 (Common Criteria)?
Available Choices (select all choices that are correct)

A. To define a security management organization
B. To describe a process for risk management
C. To define a product development evaluation methodology
D. To describe what constitutes a secure product

정답：C

설명：
ISO/IEC 15408, also known as the Common Criteria for Information Technology Security Evaluation, is an international standard that provides a framework for evaluating the security of IT products and systems. The purpose of the standard is to define a common set of requirements for the security functions and assurance measures of IT products and systems, and to establish a common methodology for conducting security evaluations. The standard allows users to specify their security needs and expectations in a Security Target (ST), which may be based on one or more Protection Profiles (PPs)that define security requirements for a class of products or systems. Vendors can then implement or claim compliance with the ST or PPs, and have their products or systems evaluated by independent testing laboratories against the security criteria defined in the standard. The standard also defines a scale of Evaluation Assurance Levels (EALs) that indicate the degree of confidence in the security of the evaluated product or system. The standard is intended to facilitate the development, procurement, and use of secure IT products and systems, and to promote the recognition and acceptance of evaluation results across different countries and regions. References:
* ISO/IEC 15408-1:2009 - Common Criteria Evaluation for IT Security - Nemko1
* Common Criteria - Wikipedia2
* ISO/IEC Standard 15408 - ENISA3

질문 # 196
What are the two sublayers of Layer 2?
Available Choices (select all choices that are correct)

A. HIDS and NIDS
B. LLC and MAC
C. OPC and DCOM
D. VLAN and VPN

정답：B

설명：
Layer 2 of the OSI model is the data link layer, which is responsible for transferring data frames between nodes on a network segment. The data link layer is divided into two sublayers: logical link control (LLC) and media access control (MAC). The LLC sublayer deals with issues common to both dedicated and broadcast links, such as framing, flow control, and error control. The MAC sublayer deals with issues specific to broadcast links, such as how to access the shared medium and avoid collisions. The LLC and MAC sublayers are not related to the ISA/IEC 62443 cybersecurity standards, which focus on the security of industrial automation and control systems (IACS). References:https://www.baeldung.com/cs/data-link-sub-layers
https://bing.com/search?q=Layer+2+sublayers

질문 # 197
......

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