CISSP · Question #1260
CISSP Question #1260: Real Exam Question with Answer & Explanation
The correct answer is B: Data Link and Physical Layers. The TCP/IP model's network access layer maps to the OSI model's Data Link and Physical layers, both handling hardware-level framing, MAC addressing, and bit transmission.
Question
Which Open Systems Interconnection (OSI) layer(s) BEST corresponds to the network access layer in the Transmission Control Protocol/Internet Protocol (TCP/IP) model?
Options
- ATransport Layer
- BData Link and Physical Layers
- CApplication, Presentation, and Session Layers
- DSession and Network Layers
Explanation
The TCP/IP model's network access layer maps to the OSI model's Data Link and Physical layers, both handling hardware-level framing, MAC addressing, and bit transmission.
Common mistakes.
- A. The OSI Transport layer (Layer 4) maps to the TCP/IP transport layer, not the network access layer, as it handles end-to-end communication via TCP and UDP.
- C. The OSI Application, Presentation, and Session layers (Layers 7, 6, and 5) collectively map to the TCP/IP application layer, not the network access layer.
- D. The OSI Session layer (Layer 5) maps to the TCP/IP application layer, and the OSI Network layer (Layer 3) maps to the TCP/IP internet layer - neither corresponds to the network access layer.
Concept tested. TCP/IP to OSI layer mapping correspondence
Reference. https://learn.microsoft.com/en-us/windows-server/networking/technologies/nic-teaming/nic-teaming
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