通信专业业务 - 题库学习平台

In the microwave transmission,the rain attenuation are calculate

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Digital microwave systems can be used for telephone, data, image

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The remote communication of the microwave relay communication is

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In the digital microwave communication system, in order to meet

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What's function of the duplexer in the microwave communication s

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Microwave transmitter transforms the signal with baseband level

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How long is the microwave propagation distance？（）

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What is the Microwave Communication frequency band？（）

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TDM, WDM make contributions to enhancement of optical fiber tran

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The optical communication consists of transmitter,fiber and rece

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The feature of optical fiber is high bit rate and short transmis

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According to the type of optical signal in the fiber, the optica

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The usage of optical communication is （）.

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Which one is not discribing the optical communication？（）

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The goal of optical fiber is （）.

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The transmission signal in the optical fiber is（）.

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Physical, or MAC addresses, usually are assigned by the network

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A router can have many different types of interface ports.（

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Router has two primary purposes: path selection, and switching o

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Routers can connect different layer 2 technologies, such as （

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