Describe the most popular wireless Internet access technologies today. ­Compare and contrast them. 2) What is the relationship between bandwidth, signal levels, and data rate? How is channel capacity calculated? 3) Is it possible for an application to enjoy reliable data transfer even when the application runs over UDP? If so, how?

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Fundamentals of WAN

A collection of networks and/or local area networks (LAN) which communicate with each other is called a wide area network (WAN). A telecommunication network is extended over the geographical area for the basic computer network purpose (by connecting all smaller networks). From any part of the world, WAN allows communication and sharing the data between devices.