text: why do you need the osi model? how do you think networking would be different if there was no osi model? why? without the osi model, either their wouln't have been network connection, or they would have worked on inventing another model that helps in networking...  regarding its importance: its a mean of communicatoin where data is encrypted/decrypted using a certain protocol installed on both pc's, that is then interpretted to binary, and segmentted in packets to speed up the process of data delivery while guaranteeing that there is no data loss...as if a packet is not delivered, the protocol re-requests this packet from teh source to complete teh file...  the protocol also, hashes the file to examine that it is identical...