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Which layer of the OSI model is responsible for compression?
Presentation
Application
DataLink
Session
NO worries. Remember that It was decided to let the presentation layer handle all the problems relating to the representation of transmitted data, including conversion, encryption and data compression. Unlike the lower five layers, which merely deal with the orderly movement of bits from source to destination, the PRESENTATION LAYER is concerned with preserving the 'meaning' of the information transported. It is the job of the presentation layer to encode structured data from the internal format used on the sending machine to a bit stream format suitable for transmission , and then to decode it to the required representation at the destination. The organizations that operate computer networks frequently expect to be paid for their efforts. In nearly every case, the cost of using a network depends on the amount of data sent. So the final bill can often be reduced by compressing the data before sending it.
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