Chapter 1. Basic Concepts: Internetworks, Routers, and Addresses
Bicycles with Motors
Data Link Addresses
Repeaters and Bridges
Routers
Network Addresses
Once upon a time, computing power and data storage were centralized. Mainframes were locked away in climate-controlled, highly secure rooms, watched over by a priesthood of IS administrators. Contact with a computer was typically accomplished by bringing a stack of Hollerith cards to the priests, who interceded on our behalf with the Big Kahuna.
The advent of the minicomputer took the computers out of the IS temple of corporations and universities and brought them to the departmental level. For a mere $100K or two, engineering and accounting and any other department with a need for data ...
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