computers

Directions:Please provide detailed and elaborate responses to the following questions.  Your responses should include examples from the reading assignments, if possible.  Your answer to each question should be at least 250 words in length and utilize APA guidelines.

1.      Explain the difference between portable Internet access and mobile Internet access.

2.      Explain what VoIP is and how it works.

3.      What is WiMAX?  Discuss why mobile WiMAX is an up-and-coming standard and briefly explain how it works.  For what kind of countries, populations, and geographical areas might WiMAX be a good option?

4.      Why do you think real-time messaging may be a better means of communication than e-mail or the telephone?  What are some of the advantages and disadvantages of real-time messaging?

5.      Define grid computing in your own words.  How does grid computing work, and what are some of the advantages of using grid computing?

6.      What is a VPN?  What kind of companies might use a VPN, and for whom in the company would this be useful?  Please provide an example.