Computer Science CS50 Lecture Notes - Lecture 9: Computer Network, Microwave Transmission, Demodulation
22 May 2023
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Document Summary
Networking of computers facilitates resource sharing, sharing of information, and, can be used as a communication medium, and for backup and support. The transmission ofdata can be via guided media like twisted pair, coaxial pair, optical fibers or as radio transmission, microwave transmission, and satellite transmission. A twistedpair cable consists of four pairs of twisted copper wires. Utp are the two kinds of twisted pair. Coaxial cable has an inner conductor that transmits electric signals and an outer conductor as a ground. Simplex, half-duplex and full-duplex are three modes of data transmission. Simplex is unidirectional, halfduplex is bi-directional but one device sends data and other receives it, and, fullduplex is bi-directional and both the devices can send and receive data at the same time. Bandwidth is the amount of data that can be transferred through the communication medium, in a fixed amount of time. Throughput is the amount of data that is actually transmitted between two computers.
