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Open Systems Interconnection (OSI) Model

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This process can be thought of as an intricate interoffice bureaucracy, reminiscent of the movie Brazil. At each layer is a highly specialized receptionist who only understands the language and protocol of that layer. As data packets are transmitted, each receptionist performs the necessary duties of her particular layer, puts the packet in an interoffice envelope, writes the header on the outside, and passes it on to the receptionist at the next layer. This receptionist in turn performs the necessary duties of his layer, puts the entire envelope in another envelope, writes the header on the outside, and passes it on to the next receptionist.

Each receptionist is only aware of the functions and duties of his or her layer. These roles and responsibilities are defined in a strict protocol, eliminating the need for any real intelligence once the protocol is learned. This type of uninspired and repetitive work may not be desirable for humans, but it's ideal work for a computer. The creativity and intelligence of a human mind is better suited to the design of protocols such as these, the creation of programs that implement them, and the invention of hacks that use them to achieve interesting and unintended results. But as with any hack, an understanding of the rules of the system is needed before they can be put together in new ways.

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