Shiva Yousefi - Taali university,Ghom, Iran
Mohamad Asgari - Islamic Republic of Iran Broadcasting university,Tehran, Iran

Over the last decades, users have witnessed the growth and maturity of the Internet. As a consequence, there has been an enormous growth in network traffic, driven by rapid acceptanceof broadband access, along with increases in system complexity and content richness. CDN, provides services that increases theefficiency of the network bandwidth, and increases the access and maintains the accuracy of the information duringtransmission. One of the most important requests in the contextof the Internet is watching video live streaming with techniques that can be transferred. The aim of this study is to enhance theQOS and increase the efficiency of the transfer of the content in the context of the Internet. The results of this research in the formof diagrams in order to compare the advantages and disadvantages of using a CDN will be shown at the end of thereview proposals. Finally we concluded that the use of this technology in the context of the Internet in Iran can increase the QOS and customer satisfaction levels

CDN, Live Streaming, QOS, Delay, Jitter, Packet loss, surrogate