Suggest an editImprove this articleRefine the answer for “Which OSI model layers are combined in the TCP/IP network access layer?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)The **TCP/IP network access layer** combines the OSI physical layer (L1) and the OSI data link layer (L2). **Key point:** TCP/IP does not separate them because, in practice, signal transmission and frame formation always work together.Shown above the full answer for quick recall.Answer (EN)Image**The TCP/IP network access layer combines:** 1. **OSI Physical layer (L1 - Physical)** 2. **OSI Data Link layer (L2 - Data Link)** --- ## Why these specific layers? The TCP/IP network access layer is responsible for **how data is actually transmitted over the network**: via cable, Wi-Fi, fiber optics, and so on. In other words, it includes: - physical signals, frequencies, cables, connectors - this is **OSI L1** - forming Ethernet frames, MAC addressing, VLANs, switch operation - this is **OSI L2** In TCP/IP, it was decided **not to separate** them, because in practice they always work together.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.