The sixth layer (presentation Layer) acts as a translator between several languages, it is able to determine the type of information received and sent (text, flash, wave, format of transmitted documents, ....) and to identify the program that deals with each type, the debug program often opens the application/program that acts on behalf of the information, for example running acrobat reader inside internet explorer. In order to display the received information (pdf) type. It also recognizes the type (text enconding).