Internet is a universal system of interrelated computer network, which use the typical Internet Protocol Suite (TCP or IP). It provides internet services billions of users globally. Internet is a web of networks, which contain billions of public and personal, business, educational, and system of government of local to global range, which is connected by a board range of “electronic” and “optical networking technologies”. Internet was invented in the 1960s by “United States research projects”. The project was sponsored by “military agencies” to construct robust, fault- tolerance and spread computer systems.