Quiz Entry - updated: 2026.07.14
What is the TCP/IP Network Access layer equivalent to in OSI?
The TCP/IP Network Access layer corresponds to OSI Layers 1 and 2 (Physical and Data Link) combined into one.
The TCP/IP model combines physical and data link into one layer:
| OSI | TCP/IP |
|---|---|
| 2 - Data Link | Network Access |
| 1 - Physical | Network Access |
Why combined?
- TCP/IP doesn't specify physical transmission details
- Different technologies (Ethernet, Wi-Fi) handle both layers together
- Keeps the model simple
Memory tip: Network Access = "How to access the network" - both physical connection and local addressing.
Go deeper:
Internet protocol suite — link layer — how OSI's Physical and Data Link combine into TCP/IP's Network Access (Link) layer.- Data link layer — the upper half of what Network Access covers.