快乐学习
一个网站喵查铺子（catpuzi.com）全搞定~
A、Used to calculate “bandwidth” and “rate” in the state of random noise
B、Use a calculation model of narrow pulse signal passing through an ideal communicat……继续阅读 »
If the following is a Manchester encoded waveform of 8-bit data, what is this data?
A、10110100
B、01001011
C、11010010
D、01011100
喵查答案：01001011
……继续阅读 »
A、Satellite communication has a large communication distance and a wide coverage range.
B、It is easy to realize broadcast communication and multiple access communication by using s……继续阅读 »
A、fc-f1=f2-fc
B、f2-f1=fc
C、f2+f1=fc
D、f1·f2=fc
喵查答案：fc-f1=f2-fc
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A、Analog channel transmits digital data
B、Analog channel transmit analog data
C、Digital channel transmit digital data
D、Digital channel transmit analog data
喵查答案：Analog channel tra……继续阅读 »
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
……继续阅读 »
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
……继续阅读 »
