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What are three possible entry points (pathways) that could be used for launching a cyber attack?
Available Choices (select all choices that are correct)
A. LAN, power source, and wireless OD.
B. LAN, portable media, and wireless
C. LAN, portable media, and hard drives
D. LAN, WAN, and hard drive
Answer: B
Explanation:
A cyber attack is an attempt to compromise the confidentiality, integrity, or availability of a computer system or network by exploiting its vulnerabilities. A cyber attack can be launched from various entry points, which are the pathways that allow an attacker to access a target system or network. According to the ISA/IEC 62443-
3-2 standard, which defines a method for conducting a security risk assessment for industrial automation and control systems (IACS), some of the possible entry points for a cyber attack are:
* LAN: A local area network (LAN) is a network that connects devices within a limited geographic area, such as a building or a campus. A LAN can be an entry point for a cyber attack if an attacker gains physical or logical access to the network devices, such as switches, routers, firewalls, or servers. An attacker can use various techniques to access a LAN, such as network scanning, spoofing, sniffing, or hijacking. An attacker can also exploit vulnerabilities in the network protocols, services, or applications that run on the LAN. A cyber attack on a LAN can affect the communication and operation of the devices and systems connected to the network, such as IACS.
* Portable media: Portable media are removable storage devices that can be used to transfer data between different systems or devices, such as USB flash drives, CDs, DVDs, or external hard drives. Portable media can be an entry point for a cyber attack if an attacker uses them to introduce malicious code or data into a target system or device. An attacker can use various techniques to infect portable media, such as autorun, social engineering, or physical tampering. An attacker can also exploit vulnerabilities in the operating systems, drivers, or applications that interact with portable media. A cyber attack using portable media can affect the functionality and security of the systems or devices that use them, such as IACS.
* Wireless: Wireless is a technology that enables communication and data transmission without physical wires or cables, such as Wi-Fi, Bluetooth, or cellular networks. Wireless can be an entry point for a cyber attack if an attacker intercepts, modifies, or disrupts the wireless signals or data. An attacker can use various techniques to access wireless networks or devices, such as cracking, jamming, or eavesdropping. An attacker can also exploit vulnerabilities in the wireless protocols, standards, or encryption methods. A cyber attack on wireless can affect the availability and reliability of the wireless communication and data transmission, such as IACS.
Therefore, LAN, portable media, and wireless are three possible entry points that could be used for launching a cyber attack. References:
* Cybersecurity Risk Assessment According to ISA/IEC 62443-3-21
* ISA/IEC 62443 Series of Standards2
NEW QUESTION # 177
Which statement is TRUE reqardinq application of patches in an IACS environment?
Available Choices (select all choices that are correct)
A. Patches never should be applied in an IACS environment.
B. Patches should be applied as soon as they are available.
C. Patches should be applied within one month of availability.
D. Patches should be applied based on the organization's risk assessment.
Answer: D
Explanation:
Patches are software updates that fix bugs, vulnerabilities, or improve performance or functionality. Patches are important for maintaining the security and reliability of an IACS environment, but they also pose some challenges and risks. Applying patches in an IACS environment is not as simple as in an IT environment, because patches may affect the availability, integrity, or safety of the IACS. Therefore, patches should not be applied blindly or automatically, but based on the organization's risk assessment. The risk assessment should consider the following factors: 1
* The severity and likelihood of the vulnerability that the patch addresses
* The impact of the patch on the IACS functionality and performance
* The compatibility of the patch with the IACS components and configuration
* The availability of a backup or recovery plan in case the patch fails or causes problems
* The testing and validation of the patch before applying it to the production system
* The communication and coordination with the stakeholders involved in the patching process
* The documentation and auditing of the patching activities and results References: ISA TR62443-2-3 - Security for industrial automation and control systems, Part 2-3: Patch management in the IACS environment
NEW QUESTION # 178
Under User Access Control (SP Element 6), which of the following is included in USER 1 - Identification and Authentication?
A. Password protection
B. Mutual authentication
C. Incident handling and response
D. Backup restoration
Answer: A
Explanation:
SP Element 6 in ISA/IEC 62443-2-1 addresses User Access Control, ensuring that only authorized users can access IACS resources.
Step 1: Definition of USER 1
USER 1 corresponds to Identification and Authentication Control (IAC), the first foundational requirement. It focuses on verifying the identity of users before granting access.
Step 2: Password protection
Password mechanisms are a fundamental form of user authentication and are explicitly included under identification and authentication requirements.
Step 3: Why other options are incorrect
Mutual authentication applies to system-to-system authentication. Backup restoration and incident handling belong to different SP Elements.
Step 4: Security intent
By enforcing password protection, the asset owner ensures accountability, traceability, and prevention of unauthorized access.
Therefore, the correct answer is Password protection.
NEW QUESTION # 179
Who is responsible for defining the tolerable residual cybersecurity risk as an input requirement for all activities?
A. Integration service provider
B. Maintenance service provider
C. Product supplier
D. Asset owner
Answer: D
Explanation:
According to the ISA/IEC 62443 series, it is the asset owner's responsibility to determine what level of residual cybersecurity risk is acceptable after mitigation strategies are applied. This value becomes a key input in defining security levels and selecting controls.
"The asset owner is responsible for defining the tolerable residual risk and establishing acceptable security levels based on business impact and risk tolerance."
- ISA/IEC 62443-3-2:2020, Clause 6.4.2 - Risk Evaluation Inputs
This forms the foundation for SL-T (Target Security Level) determination.
References:
ISA/IEC 62443-3-2:2020 - Clause 6.4.2
ISA/IEC 62443-2-1:2010 - Asset owner roles and responsibilities
NEW QUESTION # 180
According to ISA/IEC TR 62443-1-5, which documents can be referenced when creating a security profile?
A. ISA/IEC 62443-2-1, 2-4, 3-3, 4-1, and 4-2
B. Only ISA/IEC 62443-1-1 and 1-2
C. Only ISA/IEC 62443-3-3 and 4-1
D. Any cybersecurity standard outside the ISA/IEC 62443 series
Answer: A
Explanation:
ISA/IEC TR 62443-1-5 provides formal guidance on the creation and structure of cybersecurity profiles within the ISA/IEC 62443 framework. A security profile is intended to tailor existing requirements to a specific industry sector, application, or use case without altering the integrity of the base standard.
Step 1: Purpose of a security profile
The technical report clarifies that profiles are selections and combinations of existing requirements, not a mechanism to invent new controls. Profiles ensure consistent application of ISA/IEC 62443 while addressing sector-specific risk, regulatory, or operational needs.
Step 2: Authorized source documents
TR 62443-1-5 explicitly states that security profiles may reference requirements from:
* ISA/IEC 62443-2-1 (asset owner security program requirements)
* ISA/IEC 62443-2-4 (service provider requirements)
* ISA/IEC 62443-3-3 (system security requirements)
* ISA/IEC 62443-4-1 (secure product development lifecycle)
* ISA/IEC 62443-4-2 (technical component requirements)
These documents collectively cover organizational, system, and component security.
Step 3: Why other options are incorrect
* Limiting profiles to only Parts 3-3 and 4-1 excludes governance and lifecycle requirements.
* Parts 1-1 and 1-2 are foundational and definitional, not requirement sources.
* Referencing standards outside the 62443 family violates the intent of maintaining internal consistency.
Step 4: Standard integrity
By restricting profiles to these documents, ISA ensures profiles remain interoperable, auditable, and certifiable.
Thus, Option C is the only correct answer.
NEW QUESTION # 181
......
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