OSI Model
- 1978, the International Standards Organization started to develop the OSI Framework architecture
- OSI Open System Interconnection Model
- Describes Layered communications, computer networks protocol and transmission design
- It is a tool do to visualize how data moves in a network
- From bit level to human level
Layers
- Physical
- Data Link
- Network
- Transport
- Session
- Presentation
- Application
1) Physical
- Lowest Layer
- Defines the electrical and physical specifications for devices
- Layout of pins, voltage, hubs
- Network adapters
- Think binary