Data is carried through networks by signals. A signal is transmitted over a physical medium according to
Question:
Data is carried through networks by signals. A signal is transmitted over a physical medium according to some transmission technique(e.g., analog, digital, baseband, modulated, multiplexed, compressed, spread spectrum). Physical media include metallic cables, optical fibers, and the open air. A transmission medium is characterized primarily by a raw bandwidth (in Hertz) and a level of "noise" that corrupts signal transmission. These 2 criteria determine basically the transmission speed in bits/sec. The speed keeps being enhanced by advanced transmission and signal processing techniques, like equalization, compression (source coding), OFDM, MIMO, code division multiplexing, and frequency hopping.
Discuss your thoughts on the evolution from analog to digital, and what YOU believe is on the horizon for a wave of technology for voice, music, and other digital formats.
Principles Of Information Security
ISBN: 9780357506431
7th Edition
Authors: Michael E. Whitman, Herbert J. Mattord