excuse me but the osi model is a model that defines the world as the writers of that spec perceive the world into layers it does not mean it is the only model tcp is one of the main protocols in tcp ip networks whereas the ip protocol deals only with packets tcp enables two hosts to establish a connection and exchange streams of data tcp guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent the internet was built on the tcp ip model osi refines it into its own spec if you want to write about these things in the article great but be sure of your facts and one does not exclude the other they should both be talked about imho tcp ip is much more important its how things work talk contribs count