HPE Aruba Certified Network Security Professional (ACNSP) — Question 60

What is the Link Layer Discovery Protocol?

Answer options

• A. a discovery protocol used between Layer 3 devices to determine routes within a single autonomous system
• B. a standardized IPv6 neighbor discovery protocol used to replace the ARP and broadcast mechanism used in IPv4
• C. a standardized protocol for communicating directly-connected device information and capabilities.
• D. an Aruba proprietary discovery protocol supported in all Aruba switches along with Cisco Discovery Protocol or CDP

Correct answer: C

Explanation

The correct answer is C, as the Link Layer Discovery Protocol is specifically designed to communicate information and capabilities of directly connected devices. Option A is incorrect since it refers to Layer 3 devices, while the Link Layer Discovery Protocol operates at Layer 2. Option B is also incorrect because it describes IPv6 neighbor discovery, which is a different function than what the Link Layer Discovery Protocol provides. Option D is misleading as it suggests exclusivity to Aruba devices, while Link Layer Discovery Protocol is a standardized protocol.