(Understand the topology of the local area network, and be able to choose the correct structure in the specific application situation l? Can understand the meaning of the performance parameters of the transmission medium l?? Focus on the performance of coaxial cables, twisted pairs and corresponding connectors l Understand the characteristics of optical fibers Features, and can master the use of different connectors l? Understand the establishment of microwave communication systems and infrared communication systems, and be able to understand the corresponding hardware equipment)
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