"Computer network"
A,
the physical1. Data on line road transport is usually serial transmission, that is, each bit transmission in time order,
2. Simplex communication: there is only one direction of communication rather than in the opposite direction,
3. Half duplex communication: communication can send information on both sides, but not both at the same time to send,
4. The full-duplex communication: communication can both send and receive information at the same time,
5. Modulation classification: baseband modulation and bandpass modulated
6. The baseband modulation: is the digital signal into another way of digital signal,
This process is also called encoding,
7. Band modulation: is the baseband signal frequency range move into higher frequencies and translated into analog signals, so you can better in the simulation of channel transmission,
8. Transmission media: also called transmission medium or transmission medium, it is the data transmission system in the physical channel between the transmitter and receiver,
9. Transmission media can be divided into two broad categories: leading transmission media and nondirective transmission media,
10. Optical fiber communication, is the use of optical fiber transmission light pulse for communication,
11. Optical fiber are usually made of a very transparent quartz glass into filaments, mainly made up of fiber core and cladding double communication cylinder,
CodePudding user response:
Although is not very good, but, still want to continue refueling
CodePudding user response:
Learning to learn