Internet is largest and most important network of networks today, and has evolved into a global information super high way. The explosive growth is revolutionary phenomenon in computing and telecommunication areas. The internet is constantly expanding as more and more business and other organizations and their users, computer and networks joined its global web. Thousands of business educational and research networks now connect millions of computer systems in over two hundred countries (200). Internet is now a key platform for a rapidly expanding list of information and entertainment services and business applications, including enterprise collaboration and electronic commerce system. Thus, internet is a public wide network of networks, connecting many small private networks.