Chapter 5Networking Tutorial~1 min read
OSI Model
7 Layers of OSI Model
OSI Model network communication ला 7 layers मध्ये divide करते. Interview मध्ये नेहमी विचारला जातो!
- ▸Layer 1 — Physical: Cables, signals, bits (0,1)
- ▸Layer 2 — Data Link: MAC Address, same network data transfer
- ▸Layer 3 — Network: IP Address, Routing — Routers
- ▸Layer 4 — Transport: TCP/UDP, Port numbers
- ▸Layer 5 — Session: Login session management
- ▸Layer 6 — Presentation: Encryption, Compression
- ▸Layer 7 — Application: HTTP, FTP, Email (SMTP)
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Memory trick: "Please Do Not Throw Sausage Pizza Away" — Physical, Data Link, Network, Transport, Session, Presentation, Application
✅ Key Points — लक्षात ठेवा
- ▸7 layers: Physical → Data Link → Network → Transport → Session → Presentation → Application
- ▸Layer 3: IP, Routing | Layer 4: TCP/UDP | Layer 7: HTTP
- ▸Memory trick: "Please Do Not Throw Sausage Pizza Away"
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