Part Three
The Internet and Data Networks
With the advent of the Voice over Internet Protocol (VoIP) and related protocols, data networks are now able successfully to carry real-time voice, and even video, services and provide a “disruptive” alternative to circuit-switched technologies. Second, although the Internet itself has very wide bandwidth, access to the Internet has often been via narrowband public telephone networks. Once Internet services via narrowband access have been generally accepted in a country, the trend has then been to migrate to broadband technologies, so that a greater range of services can be delivered with higher speed.
In this part we discuss the basic operation of the Internet and of Local Area Networks (LANs), and we ...
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