CompTIA
N10-005 · Question #728
N10-005 Question #728: Real Exam Question with Answer & Explanation
The correct answer is B: Layer 2. MAC addresses are hardware identifiers used at the Data Link layer (Layer 2) of the OSI model to deliver frames between devices on the same network segment.
Question
The MAC address of a network device is used to communicate at which of the following OSI layers?
Options
- ALayer 1
- BLayer 2
- CLayer 4
- DLayer 5
Explanation
MAC addresses are hardware identifiers used at the Data Link layer (Layer 2) of the OSI model to deliver frames between devices on the same network segment.
Common mistakes.
- A. Layer 1 (Physical) deals with the electrical, optical, or radio signals that carry raw bits and has no concept of addressing.
- C. Layer 4 (Transport) uses port numbers, not MAC addresses, to distinguish between services and connections.
- D. Layer 5 (Session) manages communication sessions between applications and does not use MAC addressing.
Concept tested. OSI Layer 2 and MAC address function
Reference. https://learn.microsoft.com/en-us/windows-server/networking/technologies/nic-teaming/nic-teaming
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