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Exam Cybersecurity Fundamentals Specialist All Questions

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Exam Cybersecurity Fundamentals Specialist topic 1 question 33 discussion

Actual exam question from ISA's Cybersecurity Fundamentals Specialist
Question #: 33
Topic #: 1
[All Cybersecurity Fundamentals Specialist Questions]

Which is the PRIMARY reason why Modbus over Ethernet is easy to manage in a firewall?

  • A. Modbus uses a single master to communicate with multiple slaves using simple commands.
  • B. Modbus is a proprietary protocol that is widely supported by vendors.
  • C. Modbus uses explicit source and destination IP addresses and a single known TCP port.
  • D. Modbus has no known security vulnerabilities, so firewall rules are simple to implement.
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Suggested Answer: C 🗳️
by Evan7557 at Oct. 12, 2023, 10:19 a.m.

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Morax1100
4 months, 1 week ago
Selected Answer: C
The PRIMARY reason why Modbus over Ethernet is easy to manage in a firewall is that it uses: • Explicit source and destination IP addresses: This makes traffic easy to identify and filter. • A single known TCP port (Port 502): Firewalls can be configured to allow or block traffic specifically on this port, simplifying rule management.
upvoted 2 times
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Evan7557
6 months, 2 weeks ago
Answer C
upvoted 1 times
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