OSI Model
September 18, 2016
Categorised in: Computer Forensic & Cyber Applications
- International standard organization (ISO) established a committee in 1977 to develop an architecture for systems communication.
- Open System Interconnection (OSI) reference model is the result of this effort.
- This model allows any two different systems to communicate regardless of their underlying architecture.
- The OSI model describes how data flows from one computer, through a network to another computer.
- The OSI model is not a protocol; it is a model for understanding and designing a network architecture that is flexible and robust.
- The OSI model consists of seven separate but related layers, each of which defines a part of the process of moving information across a network.
Why so many layers?
- To reduce the complexity, networks are organized as a stack of layers, one below the other.
- Each layer performs a specific task,. It provides services to an adjacent layer.
- Layers 1,2, 3- physical, data link and network are network support layers.
- Layer 4, the transport layer, links the two subgroups.
- Layers 5,6,7- session, presentation, and application are user support layers.
Pratik Kataria is currently learning Springboot and Hibernate.
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