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In this paper, all optical network’s general structure is briefly described and all optical network’s optical switching methods is concantrated on. All optical network’s classification is presented according to switching methods and burst switching methods studied carefully.The protocols which are defined for burst switching are studied. One of these protocols JET (Just-Enough-Time) which is mostly studied, is introduced. And the other protocol JIT (Just-In-Time) is presented detailly. The main aim of this study is explaining the all optical network’s working mechanism generally, and examine the processing structure of JIT protocol.