What is the Difference Between 802.11B, 802.11G, and 802.11N?

What does the term Cloud Computing mean?  Does it have practicality in the enterprise or is it a buzzword that will die out? (250 words)

What is the Difference Between 802.11B, 802.11G, and 802.11N? (250 words)

Describe the basic features of star topologies. (about 120 words)

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