ISA ISA-IEC-62443 Reliable Dumps Book | ISA-IEC-62443 Valid Test Pass4sure

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q16-Q21):

NEW QUESTION # 16
Which is the BEST deployment system for malicious code protection?
Available Choices (select all choices that are correct)

A. Zones and conduits
B. Network segmentation
C. Application whitelistinq (AWL) OD.
D. IACS protocol converters

Answer: C

Explanation:
Application whitelisting (AWL) is a technique that allows only authorized applications to run on a system, and blocks any unauthorized or malicious code from executing. AWL is one of the most effective methods for preventing malware infections and reducing the attack surface of a system. AWL can be implemented at different levels, such as the operating system, the network, or the application itself. AWL is especially useful forindustrial automation and control systems (IACS), which often run on legacy or proprietary platforms that are not compatible with traditional antivirus software or other security solutions. AWL can also help protect IACS from zero-day attacks, which exploit unknown vulnerabilities that have not been patched or detected by security vendors. AWL is recommended by the ISA/IEC 62443 standards as a key component of malicious code protection for IACS. According to the standards, AWL should be applied to all IACS components that support it, and should be configured and maintained according to the security policies and procedures of the organization. AWL should also be complemented by other security measures, such as network segmentation, zones and conduits, and patch management, to provide a defense-in-depth approach to IACS security. References:
* ISA/IEC 62443-3-3:2013, System security requirements and security levels, Section 5.2.3.41
* ISA/IEC 62443-2-1:2010, Establishing an industrial automation and control systems security program, Section 4.3.3.6.42
* ISA/IEC 62443-4-2:2019, Technical security requirements for IACS components, Section 4.2.3.43
* ISA/IEC 62443-3-2:2020, Security risk assessment for system design, Section 7.3.3.44
* ISA/IEC 62443-4-1:2018, Product development requirements, Section 5.2.3.45

NEW QUESTION # 17
Why is OPC Classic considered firewall unfriendly?
Available Choices (select all choices that are correct)

A. OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535.
B. OPC Classic is an obsolete communication standard.
C. OPC Classic is allowed to use only port 80.
D. OPC Classic works with control devices from different manufacturers.

Answer: A

Explanation:
OPC Classic uses DCOM, which dynamically assigns any port between 1024 and 65535. Comprehensive Explanation: OPC Classic is a software interface technology that uses the Distributed Component Object Model (DCOM) protocol to facilitate the transfer of data between different industrial control systems. DCOM is a Microsoft technology that allows applications to communicate across a network. However, DCOM is not designed with security in mind, and it poses several challenges for firewall configuration. One of the main challenges is that DCOM does not use fixed TCP port numbers, but rather negotiates new port numbers within the first open connection. This means that intermediary firewalls can only be used with wide-open rules, leaving a large range of ports open for potential attacks. This makes OPC Classic very "firewall unfriendly" and reduces the security and protection they provide. References:
* Tofino Security OPC Foundation White Paper
* Step 2 (for client or server): Configuring firewall settings - GE
* Secure firewall for OPC Classic - Design World

NEW QUESTION # 18
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. Security guidelines for the proper configuration of IACS PLCs and other programmable configurable
components of the system
B. Computers, networks, operating systems, applications, and other programmable configurable
components of the system
C. Personnel, policies, and procedures related to the security of computers, networks. PLCs, and other
programmable configurable components of the system
D. Security guidelines for the proper configuration of IACS computers and operating systems

Answer: C

NEW QUESTION # 19
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 programmed using ladder logic.
C. PLCs use serial or Ethernet communications methods.
D. PLCs are inherently unreliable.

Answer: A

NEW QUESTION # 20
Whose responsibility is it to determine the level of risk an organization is willing to tolerate?
Available Choices (select all choices that are correct)

A. Legal Department
B. Operations Department
C. Management
D. Safety Department

Answer: C

NEW QUESTION # 21
......

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ISA ISA-IEC-62443 RELIABLE DUMPS BOOK | ISA-IEC-62443 VALID TEST PASS4SURE

ISA ISA-IEC-62443 Reliable Dumps Book | ISA-IEC-62443 Valid Test Pass4sure