Abstract:
The use of Voice over IP (VoIP), which enables two users connected to Internet to have avoice conversation, plays a vital role on the performance of an enterprise companies. In thisresearch we have focused in the Virtual Private Network (VPN) environment and how to runvoice application over it. The Voice Over Internet Protocol (VOIP) is as a combination of IPnetworks, voice applications and voice calls which being replaced by the old serviceconversation and created their evolution at the technical and conceptual framework ofphone. This technology is an innovative form of phone that can dramatically increaseperformance and capacities of telephone service for businesses and individuals around theworld. But voice qualities, security, Jitters, Echo, Data loss are the pertaining problemsassociated with VoIP. To overcome this limitation in this research, we used Simulationmethod in Cisco packet tracer to secure this technology using VPN. This is because VPNestablishes a secure, encrypted connection between a computer and the internet, providing aprivate tunnel for ones data and communications while he/she uses public networks. Thus,provide users with a secure communication platform and at the same time optimized thetechnology using QoS technologies so as maintained and assure service’s performance and to avoid degradation of speech quality.
