Exam JN0-105 Topic 2 Question 49 Discussion

Actual exam question for Juniper's JN0-105 exam
Question #: 49
Topic #: 2
Which protocol is responsible for learning an IPv4 neighbor's MAC address?

Suggested Answer: A Vote an answer

The Address Resolution Protocol (ARP) is responsible for mapping an IPv4 address to a machine's MAC address. ARP operates at Layer 2 of the OSI model and is used to find the MAC address of a host given its IPv4 address. When a device wants to communicate with another device on the same local network, it uses ARP to discover the recipient's MAC address.
Reference:
Juniper official documentation: ARP.
Networking standards: RFC 826.

by Theresa at Jan 27, 2026, 06:57 AM

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