Abstract
Nowadays, videos are extensively used in different aspects of our lives such as entertainment, education and social networking. Therefore, video sharing is expected to dramatically grow in the future. There are important factors that affect the way of how to transmit videos over the clouds such as encoding techniques and compressions. In this paper, we study how distance affects QoS of real time applications such as video streaming services by means of simulation. The results show that distance has a significant impact on response time and packet end to end variation. However, throughput is not affected by far distances. hi addition, the impact varies from one application to another as well for the same application.