Differences between the OSI and TCP/IP model

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Differences between the OSI and TCP/IP model are as follows :

OSI ModelTCP/IP model
It is developed by ISO (International Standard Organization)It is developed by ARPANET (Advanced Research Project Agency Network).
OSI model provides a clear distinction between interfaces, services, and protocols.TCP/IP doesn’t have any clear distinguishing points between services, interfaces, and protocols.
OSI refers to Open Systems Interconnection.TCP refers to Transmission Control Protocol.
OSI uses the network layer to define routing standards and protocols.TCP/IP uses only the Internet layer.
OSI follows a vertical approach.TCP/IP follows a horizontal approach.
OSI model use two separate layers physical and data link to define the functionality of the bottom layers.TCP/IP uses only one layer (link).
OSI layers have seven layers.TCP/IP has four layers.
OSI model, the transport layer is only connection-oriented.A layer of the TCP/IP model is both connection-oriented and connectionless.
In the OSI model, the data link layer and physical are separate layers.In TCP, physical and data link are both combined as a single host-to-network layer.
Session and presentation layers are not a part of the TCP model.There is no session and presentation layer in TCP model.
It is defined after the advent of the Internet.It is defined before the advent of the internet.
The minimum size of the OSI header is 5 bytes.Minimum header size is 20 bytes.
Differences between the OSI and TCP/IP model

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