快乐学习
一个网站喵查铺子（catpuzi.com）全搞定~
A、Half duplex communication
B、Simplex communication
C、Datagram
D、Full duplex communication
喵查答案：Full duplex communication
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A、Coaxial cable
B、Optical Fiber
C、Twisted pair
D、Wireless
喵查答案：Optical Fiber
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A、BSK, PSK, LSK
B、ASK, FSK, PSK
C、AKS, FKS, PKS
D、BKS, PKS, FKS
喵查答案：ASK, FSK, PSK
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A、The main task of the physical layer is to ensure the correct transmission of the bit stream through the transmission medium
B、The transmission media connecting physical layer may……继续阅读 »
A、Data transmission rate represents the number of transmitted binary bits per second
B、For binary data, that data transmission rate is S=1/T (bps)
C、Common data transmission rate u……继续阅读 »
A、The repeater can regenerate digital pulses to remove signal distortion, and the amplifier amplifies the analog signal as well as the analog signal distorted
B、Digital signals are……继续阅读 »
A、Line Switching
B、Message exchange
C、VCP switch
D、Datagram packet exchange
喵查答案：Message exchange
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A、Modulator and Demodulator
B、Demodulator and Modulator
C、Encoder and decoder
D、Decoder and encoder
喵查答案：Modulator and Demodulator
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A、Synchronous time division multiplexing
B、Space division multiplex
C、Asynchronous time division multiplex
D、Frequency division multiplex
喵查答案：Frequency division multiplex
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A、Message Exchange
B、Line Switching
C、VCP switch
D、Datagram packet exchange
喵查答案：Line Switching
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A、Synchronous time division multiplexing
B、Statistical time division multiplex
C、Frequency division multiplex
D、Wavelength division multiplexing
喵查答案：Statistical time division mult……继续阅读 »
A、Switching Technology
B、Synchronization Technology
C、Coding Technology
D、Transmission Technology
喵查答案：Synchronization Technology
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A、ASK
B、FSK
C、PSK
D、NRZ
喵查答案：PSK
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A、Frequency characteristics
B、Signal-to-Noise Ratio
C、Phase Characteristics
D、Noise Power
喵查答案：Signal-to-Noise Ratio
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A、Message Header
B、End of message
C、Routing
D、Group Number
喵查答案：Group Number
……继续阅读 »
