Difference between OSI Model and TCP/IP Model.

 OSI Model

 It is developed by ISO (International Standard Organization).

 OSI model provides a clear distinction between interfaces, services, and protocols.

OSI refers to Open Systems Interconnection.

OSI uses the network layer to define routing standards and protocols. 

OSI follows a vertical approach. 

OSI layers have seven layers.

In the OSI model, the transport layer is only connection-oriented

In the OSI model, the data link layer and physical are separate layers.

Session and presentation layers are a part of the OSI model. 

It is defined after the advent of the Internet.

The minimum size of the OSI header is 5 bytes.

TCP/IP Model

It is developed by ARPANET (Advanced Research Project Agency Network). 

TCP/IP doesn’t have any clear distinguishing points between services, interfaces, and protocols.  

TCP refers to Transmission Control Protocol. 

TCP/IP uses only the Internet layer. 

TCP/IP follows a horizontal approach. 

TCP/IP has four layers. 

A layer of the TCP/IP model is both connection-oriented and connectionless.  

In TCP, physical and data link are both combined as a single host-to-network layer. 

There is no session and presentation layer in the TCP model.  

It is defined before the advent of the internet. 

The minimum header size is 20 bytes