OSI model

What is OSI model and what is OSI layers & how it works?

OSI model: - OSI stands for open system interconnection it is a product of the Open Systems Interconnection effort at the International Organization for Standardization (IOS). It is a prescription of characterizing and standardizing the functions of a communications system in terms of abstraction layers. Similar communication functions are grouped into logical layers. A layer serves the layer above it and is served by the layer below it.

OSI Layers:-

·         ApLayer:-plication  its working on some protocol PDU( protocol data unit)

·        Presentation Layer: - its working on Data compression and encryption.

·        Session Layer: - it’s used for PC to PC connectivity.

·        Transport Layer: - it’s totally responsible for transport the data and provides port numbers to data.

·        Network Layer: - it’s providing the IP address.

·        Data Link Layer: - it’s providing the physical address.

·        Physical Layer :- it’s convert Data into Bits