说明: 1.Q: Whatistheroleofmiddlewareinadistributedsystem? A: Toenhancethedistributiontransparencythatismissinginnetworkoperat- ingsystems.Inotherwords,middlewareaimsatimprovingthesingle-system viewthatadistributedsystemshouldhave. 2.Q: Explainwhatismeantb
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