t: optical transmission networkРStudent answer: [D:]РScore: [5] test score: 5. 0РTip:Р(error)РWhen the number of errors in one second is greater than 30%, the second is one.РРBackground piece by mistakeРError block secondРThe ESRРSevere missed block secondРKnowledge point: optical transmission networkРStudent answer: [C]РScore: [0] test score: 5. 0РTip:РWhich of the following technologies is not the backbone transmission technology in the wans?РIP over SDHРРIP over WDMРPONРGEРKnowledge point: urban optical networkРStudent answer: [D:]РScore: [0] test score: 5. 0РTip:РBroadband metropolitan area network is divided into core layer, aggregation layer and.РThe channel layerРAccess layerРReuse section of the layerРThe application layerРKnowledge point: urban optical networkРStudent answer: [B:]
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