Introduction What is Internet? It is a network of networks or rather, a collection of interconnected networks, publicly accessible from around the world. Internet provides a lot of services like the World Wide Web (WWW), e-mail, online chat, search engines and much more. This chapter elaborates the concepts related to the Internet and WWW. Internet and Its Components Internet is a worldwide collection of publicly accessible interconnected computer network. It is actually a network of networks. It may consist of millions of smaller domestic business, academics, organisation and government networks. Each of these smaller networks might connect hundreds or thousands of computers. Information and services such as electronic mail, online chat, file transfer, and most importantly the resources of the World Wide Web (www) are facilities provided by the Internet. These computers on dissimilar networks communicate on the Internet using a common language or set of rules called proto