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Data and Computer Communications - …
data and Computer Communications Chapter 3 data Transmission data Transmission The successful transmission of data depends on two factors: quality of the signal being transmitted characteristics of the transmission medium Transmission Terminology data transmission occurs between transmitter and receiver over some transmission medium. communication is in the form of electromagnetic waves. Guided media twisted pair, coaxial cable, optical fiber Unguided media (wireless) air, vacuum, seawater TransmissionTerminology TransmissionTerminology Simplex signals transmitted in one direction Half duplex both stations transmit, but only one at a time Full duplex simultaneous transmissions Frequency, Spectrum and Bandwidth analog signal signal intensity varies smoothly with no breaks digital signal signal intensity maintains a constant level and then abruptly changes to another level periodic signal signal pattern repeats over time a
Data and Computer Communications Chapter 3 – Data Transmission . Data Transmission The successful transmission of data depends on two factors:
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