| OSI reference model | TCP/IP model |
| OSI stands for Open system interconnection, and it is developed by the international standard organization (ISO). | TCP/IP stands for Transmission control protocol/ internet protocol, and it is developed by the Department of defence (DOD). |
| OSI is a general protocol self-reliant model. It behaves as a connection gateway between the network and the host. | The TCP/IP model rely on modern protocols about which the computer network has generated. |
| It is 7-layer architecture. | It is 4-layer architecture. |
| In OSI model network layer provides connection-oriented services as well as connectionless services. | In TCP/IP model network layer provides only connectionless services. |
| This model reference follows the vertical approach. | The TCP/IP model follows the horizontal approach. |
| It is delineated after the development of the internet. | It is delineated before the development of the internet. |
| The minimum size of OSI header is 5 bytes. | The minimum size of TCP/IP header is 20 bytes. |
| It allows the normalization of devices like hubs, motherboards, routers, and other hardware devices. | It does not allow the normalization of the hardware devices. |
| When the mechanism changes, the protocols of the OSI model can be simply interchanged. | The protocols of TCP/IP model can’t be interchanged. |
| The transport layer gives the guarantee of transmission of data packets in the OSI model. | The transport layer does not give assurance for the transmission of data packets in TCP/IP model. |
