ISA/IEC 62443 Practice Question: A chemical facility wants to allow remote vendor access to a PLC.... | CyberCertPrep

ISA/IECISA/IEC 62443IEC 62443: Zones, Conduits & Security LevelsEASYFree question

A chemical facility wants to allow remote vendor access to a PLC. Which zone design principle is most relevant?

A.A controlled conduit through the DMZ with strict access controls must be established
B.Direct connection is acceptable
C.The vendor should be given enterprise network access
D.Remote access zones are not part of IEC 62443

Why A is correct

Remote vendor access should traverse a controlled conduit through the DMZ with authentication, encryption, and monitoring.

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Where this fits in the ISA/IEC 62443 exam

IEC 62443: Zones, Conduits & Security Levels

Zones and conduits partitioning model, security levels (SL 1-4), target vs. achieved vs. capability security levels.

This question belongs to the "Zones, Conduits & Security Levels" domain, which makes up about 20% of the ISA/IEC 62443 exam.

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A chemical facility wants to allow remote vendor access to a PLC. Which zone design principle is most relevant?

Where this fits in the ISA/IEC 62443 exam

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