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