Voice over IP is one of the mind blowing technologies used in communication and data transfer nowadays. It incorporates reduced phone rates for its subscribers and it is one of the most widely used technologies. The new voice over IP technology provides the best quality service rather than its previous version. It is very handy to use and renders wide variety of features and values to its subscribers. When compared to broadband connection, the usage of this technology has become very cheap and reliable. It is very robust in nature and depends on the climatic conditions of the area it is used. It involves efficient routing of packets that carry data and it processes them very quickly. One more advantage is that the packets arrive at the same receiver and at the same time interval through different routes and the voice over IP software gathers all these packets, arranges them according to the sequence numbers in the frames of the packets and sends them to the respective receiver. Hence, it prevents data from being dropped in the route and maintains correctness of the packets thereby preventing the receiver from receiving irrelevant data or collapsed data. The growth of voice over IP is in such a way that it will replace traditional telecommunication methods and devices in the years to come.