Abstract
The convergence of computer networks and telecommunication technologies resulted in the explosive growth of the global information infrastructure. The independent research on distributed communications at RAND (1964), Advanced Research Projects Agency Network (ARPANET) sponsored by Defense Advanced Research Projects Agency (DARPA) group (1967), and network research at The British National Physical Laboratory (1965) have resulted in the development of packet switched networks. In 1972, the materialization of an open networking architecture [1] and the Transmission Control Protocol/Internet Protocol (TCP/IP) formed the fundamental milestone for the successful development of the Internet. During early 1980s, TCP/IP included in the Berkeley UNIX operating system became popular for several network services. Subsequently, in 1986, National Science Foundation (NSF) funded a new high-speed backbone network called NSFNET. Another significant evolution of hypermedia software interface to the Internet, called World Wide Web (WWW) (1991) made the Internet extremely popular. In 1997, various Internet service providers (ISPs) reported traffic growth on Internet at the rate of 10–20% per month. Ever since, the Internet has evolved so fast, that it became a vital part of communication infrastructure across the globe.
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