Suggest an editImprove this articleRefine the answer for “Name all the layers of the OSI model.”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**The OSI model** consists of **seven layers**, listed from bottom to top: from physical data transmission to the application layer. **Key point:** the layers go in the order Physical, Data Link, Network, Transport, Session, Presentation, Application, each responsible for its own part of network interaction.Shown above the full answer for quick recall.Answer (EN)ImageThe OSI model consists of **seven layers**, listed *from bottom to top*, from physical data transmission to the application layer: ## 1. Physical Layer Transmits raw bits: cables, connectors, signals, frequencies. ## 2. Data Link Layer Works with frames and MAC addresses, provides access to the medium. ## 3. Network Layer Responsible for packet routing and IP addressing. ## 4. Transport Layer Ensures data delivery between hosts (TCP/UDP). ## 5. Session Layer Manages the establishment, maintenance, and termination of sessions. ## 6. Presentation Layer Encryption, compression, data encoding. ## 7. Application Layer The layer of application protocols: HTTP, DNS, SMTP, and others.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.