SNA - Definition
SNA is an abbreviation or Systems Network Architecture. It is a network model devised by IBM to enable IBM products, including mainframes, terminals, and peripherals, to communicate and exchange data. SNA started out as a five-layer model and was later extended with two additional layers to correspond more closely to the ISO/OSI Reference Model. More recently, the SNA model was modified to include minicomputers and microcomputers in a specification known as APPC (Advanced Program to Program Communications).
Top Reasons To Wipe Away Your Internet History
- Information about all the web sites you have visited is stored on your computer!
- Every image you have ever viewed, sent or received over the Internet is stored on your system!
- There is a record of every program that you have ever downloaded or used on your hard drive!
- Pressing the delete button and emptying the recycle bin does NOT completely delete your files!
- Cleaning your History Files improves the speed of your computer and frees valuable disk space!
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