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Optical Burst Switching (OBS) can cater the requirements of bandwidth intensive applications like Voice-over-IP, video conferencing, interactive video on demand. It is switching technique for the next generation optical networks. This paper deals with merits and the protocols used for the Optical Burst Switching. A brief survey of QoS open research issues for TCP/OBS connections is also discussed. Internet Protocol (IP) dominates network technology because of the growth of internet applications like Voice over Internet Protocol (VoIP), Video Conferencing; Interactive Online Entertainment, etc. The inception of Wavelength Division Multiplexing (WDM) allows multiplexing hundreds of channels per fiber.
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