Conceptual model that characterizes and standardizes the internal functions of a communication system by partitioning it into abstraction layers. The model is a product of the Open Systems Interconnection project at the International Organization for Standardization (ISO), maintained by the identification ISO/IEC 7498-1.
Its seven-layered approach to data transmission divides the many operations up into specific related groups of actions at each layer.
OSI Model
Source : Clean-clouds-OSI Model
Each OSI layer have a specific protocol or task for doing the communication is called TCP/IP
What is TCP/IP ( Transmission Control Protocol (TCP) and the Internet Protocol (IP) ) :
The Internet protocol suite is the networking model and a set of communications protocols used for the Internet and similar networks. It is commonly known as TCP/IP, because its most important protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP), were the first networking protocols defined in this standard. It is occasionally known as the DoD model, because the development of the networking model was funded by DARPA, an agency of the United States Department of Defense.
TCP/IP provides end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination. This functionality has been organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved.[1][2] From lowest to highest, the layers are the link layer, containing communication technologies for a single network segment (link), the internet layer, connecting independent networks, thus establishing internetworking, the transport layer handling process-to-process communication, and the application layer, which interfaces to the user and provides support services.
TCP/IP Model
OSI vs TCP/IP
Source : tcpipguide-TCP/IP model
coffeeshop.macinfotechnologies-TCP/IP model
electronicdesign.com-Difference-between-osi-seven-layer-network-model-and-tcpip
vlsm-calc.net-OSI&TCP/IPmodels
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