This project explores the concepts of Voice over Internet Protocol (VoIP) as well as the benefits of using virtualization, its weaknesses, and ways of combining it with classical VoIP technologies applied to large scale businesses. In this project, network parameters such as jitter, difference, and delta are analyzed in detail to study how the parameters affect the quality of the call on VoIP. A host machine and a virtual machine are used to compare the quality of call by capturing packets sent through VoIP with the help of Wireshark. The project is divided into two sections: performance measures and security. Results show the increased performance of the virtual machine over the past two years. The host machine has a higher call quality when compared to the virtual machine. Moreover, by incorporating Wireshark, the Skype shows improved security when compared to the Ekiga.