Wireless technologies

Describe three types of commonly used wireless technologies.

Why do we need modulation?

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What is prefix and what is a suffix?

How many networks can be specified by each of the primary classes?

How many hosts can be specified in each of the primary classes?

For a given binary number 10010101, find its corresponding decimal value.

Applications are often supported by an online version of the paper documentation; in some cases there is no paper documentation at all.

What are the advantages of online documentation?

What are the disadvantages, and how can they be overcome?

1. Using your library facilities and the world wide web, investigate the benefits and limitations of adaptive help systems. What examples of adaptive and adaptable help are available and how useful are they?

2. Which usability principles are especially important in the design of help systems, and why?

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