click below
click below
Normal Size Small Size show me how
OSI Model
The Open Systems Interconnection Model
Layer Number | Layer Name | PDUs | Devices |
---|---|---|---|
Layer 1 | Physical | Bits | Hubs |
Layer 2 | Data Link | Frames | Switch |
Layer 3 | Network | Packets | Router |
Layer 4 | Transport | Segments | Firewall |
Layer 5 | Session | ||
Layer 6 | Presentation | ||
Layer 7 | Application |