Analogy Between The 7 Layer Of The OSI Model

For example, one could make an analogy between the seven levels of the OSI   model and the processing of a conventional telephone call, as follows:

1. Physical layer. Concerns the sounds spoken into the telephone mouthpiece and heard to the receiver earpiece.
2. Link layer. Involves speaking when required and listening when necessary. A repeat is requested if something is misunderstood. The person at the other end is told to slow down if he or she is talking too fast.
3. Network layer. Concerns dialing the number and listening for the connection to be made. If the busy signal is given, dial again. On completion of the call, disconnect by replacing the handset.
4. Transport layer. Involves deciding which is the most cost-effective way to make the call (which carrier to use).
5. Session layer. Concerns deciding if one call will suffice or whether several will be necessary. Will more than one person need to be included? If so, who will control a subsequent conference type of call? Who will resetup the call if cut off?
6. Presentation layer. Establishes whether or not the two parties are speaking the same language.
7. Application layer. Is concerned with: Am I speaking to the right person? Who will pay for the call? Is it convenient to converse now or should the call be placed again later? Does the called party have the means to make notes on the conversation?