The invention of communication networks has revolutionized the way, we live, we study, do business, deal with banks and government departments. Terms like e-government, e-business, e-banking, online shopping, all are due to communication networks. Everyone wants to connect his or her computer with internet. Companies having only two or three computers are also interested to network then each other. Multi-national companies and corporate sectors are offering attractive jobs for IT professionals who have latest skills in the field of hardware and networking.