The "transport" layer of the OSI model performs a series of miscellaneous functions
Machine function also called miscellaneous functions—influence. positive functions on the machine, such as diverting the spindle rotation and coolant on and off, the path action of the tool, and the program beheading.
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There should be more context to this question but I would say there is a variety of things that could be seen as communication equipment, such as email, telephone, voice message, through mail.
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I think you just add all the Bytes together
It is considered a strategic use of money as it attracts talented computer programmers out there