A: digital communication
B: digital transmission
C: transmission path
举一反三
- Generally speaking, digital transmission can get higher signal quality than analog transmission, because? 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 smaller than analog signals and are not prone to distortion C: Analog signals are continuous and are not prone to distortion D: Digital signal is easier to sample than analog signal
- Translate the English expression into English“人传人” A: people-to-people delivery B: person-to-person spread C: human-to-human transmission
- 中国大学MOOC: Digital transmission does not need to have _________ S/N ratio (信噪比) as analog (模拟) transmission.
- The transmission rate of the binary digital transmission system is 2400B,then the transmission bit rate is ____;if the system is hexadecimal, with the same symbol rate, the transmission bit rate is ____. A: 2400 bit/s, 2400 bit/s B: 2400 bit/s, 4800 bit/s C: 2400 bit/s, 9600 bit/s D: 4800 bit/s, 9600 bit/s
- 数字摘要的英文为（ ）。 A: Digital Digest B: Digital Signature C: Digital Abstract; D: Digital Envelope
内容
- 0
If the transmission rate of a communication link is 4800b / s and 8 levels transmission is adopted, the code transmission rate is ( ) A: 1600 Baud B: 600 Baud C: 4800 Baud D: 1200 Baud
- 1
When a digital signal is transmitted in an analog transmission system, what are required at the transmitting and the receiving ends respectively? A: Modulator and Demodulator B: Demodulator and Modulator C: Encoder and decoder D: Decoder and encoder
- 2
Which is the modulation and demodulation technology mainly used among the following communication modes? A: Analog channel transmits digital data B: Analog channel transmit analog data C: Digital channel transmit digital data D: Digital channel transmit analog data
- 3
A file stream is a one-way transmission path that is used to connect a file stored on a physical device to a program.
- 4
The Optical Path technology can improve the transmission capacity of lines and the throughput of nodes at the same time.