The OSI Model was created by the Internatinal Organization for Standardization (Motto: "We only sound like a communist terrorist group") to allow for network compatability, easier trouble shooting, and a gradual breaking down of our individuality. Of course they won't tell you that, "We aren't trying to turn you into mindless zomies!" they explain, shouting to be heard over the screams of their test subjects. But, putting that aside, they did make a useful model that has to be memorized by everyone right now.
The first semester having been passed by me, I am confident that the OSI model will not object to being explained by me. The OSI model consists of seven layers, the Application layer, The Presentatin layer, the Session leyer, the Trnasport layer, the Network Layer, the Data Link layer, and the Physical layer. Each layer performs certain functions to get information from point A to point B. It has been argued that maybe data should go from point B to point A, or maybe a point C should get involved. But than point A hired Someone tobreak point B's legs and nothing was heard about it again.
The application Layer
The application layer is the layer closest to the user, it accompishes this thorugh providing to user applications. This makes it feel special so it refuses to provide services to any of the other layers. Some examples of applications are spreadsheet programs, word processing programs, and bank terminal programs, or if you are a normal person e-mail and web browsers. The Application layer checks whether or not a "communication partner" is "available," synchronizes and establishes agreements on procedure for error recovery and control of data integrity.