One of the major challenges faced by the Internet today is the quality of service (QOS) for the real time (Time Critical) multimedia data. Many protocols have been developed to ensure the end to end seamless delivery of the time critical data. Some of these protocols use labeling methodology in which the data traveling between the nodes on internet is labeled so that it may be prioritized to avoid delay. The other protocols ensure the end to end resource allocation and guarantee the bandwidth for the time critical data. Out of these protocols the point of discussion in this study is IntServe (Integrated Services) and DiffServe (Differentiated Services) that are being tested and analyzed for their performance related to the traditional Best-Effort.

Imtiaz Ahmad bhat is doing MS(Telecom Networks) from Iqra University Islamabd and working as Director NTC at Mirpur University of Science & Technology (MUST). Faisal is doing his MS(Software Engineering) from Iqra University Islamabad and working as a Programmer in Mirpur University of Science & Technology (MUST), Mirpur Azad Kashmir, Pakistan.