OSI (OPEN SYSTEMS INTERCONNECTION)
7.  APPLICATION	This layer initiates and accepts requests.  It is a type of
	organizer that decides which interface is needed and transfers
	to the location, whether it is E-MAIL, for database access.
	GATEWAYS work at Layer 7, and 1-6 also.
6.  PRESENTATION	Presentation is a translator.  Adds encryption, formatting info. &
	display information to the packet.
5.  SESSION	Coordinates Communication.  The session is a type of
	negotiator, determining how long you will talk and the size of
	the packets.
4.  TRANSPORT	Sole purpose to deliver accurate error-free data.  It contains
	Protocols such as Net BEUI and TCP/IP.
3.  NETWORK LAYER	Sequencing and addressing information is added to the packet.
	This layer determines the actual route the packet will take when
	it is transferred.
	ROUTER & BROUTER work at this level
2.  DATA-LINK	Adds the CRC to the trailer, and can break the data into even
	smaller frames.  Decides on the media choosen.
	BRIDGE & BROUTER work at this level
1.  PHYSICAL LAYER	Sends bit streams of data, and receives bit streams.
	Determines Hardware Connections.
	REPEATERS & HUBS work at this level