ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 49

What are the two sublayers of Layer 2?

Answer options

• A. HIDS ana NIDS
• B. LLC and MAC
• C. OPC and DCOM
• D. VLAN and VPN

Correct answer: B

Explanation

The correct answer is B, LLC and MAC, as these are the two sublayers defined in the IEEE 802 model for Layer 2. Options A, C, and D refer to different security systems and networking technologies that do not pertain to the sublayers of Layer 2.