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Free Cybersecurity Fundamentals Specialist Exam Braindumps (page: 6)

Page 5 of 23
PDF with 88 Questions

Why is OPC Classic considered firewall unfriendly?

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

Answer(s): A



Which layer specifies the rules for Modbus Application Protoco1 (MBAP)?

  1. Data link layer
  2. Session layer
  3. Presentation layer
  4. Application layer

Answer(s): D



Which is a role of the application layer?

  1. Includes protocols specific to network applications such as email, file transfer, and reading data registers in a PLC
  2. Includes user applications specific to network applications such as email, file transfer, and reading data registers in a PLC
  3. Provides the mechanism for opening, closing, and managing a session between end-user application processes
  4. Delivers and formats information, possibly with encryption and security

Answer(s): B



Which factor drives the selection of countermeasures?

  1. Foundational requirements
  2. Output from a risk assessment
  3. Security levels
  4. System design

Answer(s): B






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