8Packetised Data Communications
Historical Note
Internet development traces its roots back to the 1950s and the emergence of main-frame computers. Early computers (pictured) were stand-alone machines and did not have the means to communicate with other machines: commands, programming and data storage and transfer were carried out manually using magnetic tapes (pictured) [1] or punch cards (pictured).1 As the usage of computers in business and government applications grew, interactions between computers, and between computers and network terminals became necessary. Clearly there was a need for a theoretical framework and network equipment to support computer communications, which needed to be developed.
On the theoretical ...
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