Data Transmission
Medium:
- Guided: twisted pair, coaxial cable, optical fiber
- Unguided: radio, satellite, infrared, microwave
Direct link: point-to-point or guided
- Two devices share the medium (intermediate repeaters, amplifiers)
Indirect link: multipoint or broadcast
- More than two devices share the medium
Transmission modes: simplex, half-duplex, full-duplex
Frequency, spectrum, bandwidth
- Time-domain vs. frequency domain