Comparison between OSI and TCP/IP :-
| OSI | TCP/IP |
| 1. Open Systems Interconnection | 1. Transfer Control Protocol / Internet protocaol |
| 2.Number of layers are seven (7). | 2.Number of layers are four (4). |
| 3.Connection oriented and connectionless in network and only connection oriented in transport. |
3.Only connectionless in Internet and both in Transport. |
| 4. Distinction 1.Services 2.Interfaces 3.Protocols |
4.Does not distinction between them. |
| 5.Model first developed. Therefore, Not biased toward one protocol general model. |
5.Protocol first developed Therefore, does not fit any other protocol stack. |
| 6.No thought was given to inter-networking | 6.Main goal to handle inter-networking. |
| 7.Model useful,Protocols not popular. | 7.Model not widely accepted ,Protocols universally used. |
| 8.S and P layers empty.
D and N layers overfull. Many function addressing ,flow control and error control reappear. |
8.No distinguish nor mention P and D layer even have functionalities. |
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