PHYSICAL MEDIA
- Twisted-pair cable: consists of two independently insulated wires twisted around each other (128 mb per sec)
- Coaxial cable: consists of an insulated center wire grounded by a shield of braided wire (200 mb per sec)
- Fiber-optic cable: contains hundreds of clear fiberglass or plastic fibers(2 billion mb per sec)
- ISDN (Integrated Service Digital Network) line: a special digital telephone line that transmits and receives information at very high speeds.
WIRELESS MEDIA
- Microwave system: transmit data via high-frequency radio signals through the atmosphere
- Satellite system: receive transmitted signals, amplify them, and then transmit the signals to the appropriate locations.
- Cellular technology: uses antennae resembling telephone towers to pick up radio signals within a specific area
- Infrared technology: transmit data as infrared light waves from one wave device to another, providing wireless links between PCs and peripherals.
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