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Abstract
The advent of internet has become an eminent part of our life as well as the services that it offers has also been increased since a decade. It provides a number of services like video streaming, e- commerce, mailing etc. Out of which Voice over Internet Protocol is one of the most popular and widely used technology of today. A form of communication which is carried out using voice with the help of Internet Protocol (IP) is termed as Voice over Internet Protocol (VoIP).