Transmission media In a data transmission system, the transmission medium is the physical path between transmitter and receiver · Guided mediun Electromagnetic waves are guided along a solid medium Unguided media Wireless transmission occurs through the atmosphere, outer space, or water The characteristics and quality of a data transmission are determined bot by the medium and the signal For guided media, the medium itself is more important in determining the limitations of transmission For unguided media, the bandwidth of the signal produced by the transmitting antenna is more important. One key property of signals transmitted by antenna is directionality Key concerns are data rate and distance: the greater the data rate and distance. the better2 Transmission Media • In a data transmission system, the transmission medium is the physical path between transmitter and receiver. • Guided medium — Electromagnetic waves are guided along a solid medium. • Unguided media — Wireless transmission occurs through the atmosphere, outer space, or water. • The characteristics and quality of a data transmission are determined both by the medium and the signal. — For guided media, the medium itself is more important in determining the limitations of transmission. — For unguided media, the bandwidth of the signal produced by the transmitting antenna is more important. One key property of signals transmitted by antenna is directionality. • Key concerns are data rate and distance: the greater the data rate and distance, the better