January 2021
Beginner
565 pages
19h 27m
English
Content preview from Fundamentals of Communications and Networking, 3rd Edition
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Supporting the Mobile Worker
Computers were originally built as large, clunky, stationary machinery. For the first few decades of digital computing, computers required specially built rooms, called data centers, with separate electricity circuits; specialized heating, ventilation, and air conditioning (HVAC) systems; and even dedicated fire suppression systems. These large computers were nearly impossible to move. Eventually, computers began to get smaller, first from mainframes to minicomputers, then to desktop computers. Although there were “portable” computers available in the early 1980s, they were affectionately called “luggable computers,” because most weighed between 15 and 30 pounds.
During the 1980s, technology developed and made ...
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