w w w . i j c s t . c o m 456 InternatIonal Journal of Computer SCIenCe and teChnology Abstract In this paper, we give an introduction to optical burst switching (OBS) and compare it with other existing optical switching paradigms. We analyze and then compare performance models of a fast-adapting and centrally controlled form of optical circuit switching (OCS) with a conservative form of optical burst switching (OBS). We compare Optical Burst Switching with Optical Circuit Switching and Optical Packet Switching techniques.