OPEN SYSTEMS INTERCONNECTION
ASSEMBLY		DISASSEMBLY
(Sending Computer)	7.  APPLICATION	(Receiving Computer)
(Levels 7 to 1)		(Levels 1 to 7)
	6.  PRESENTATION
	5.  SESSION
	4.  TRANSPORT
	3.  NETWORK
	2.  DATA-LINK
	1.  PHYSICAL
	ACROSS THE DATA LINE
The sending computers sends the data from levels 7 to 1, across the data line.
The receiving computers receives the data from levels 1 to 7, or in essence the
reverse order.