Here are of three common data transmission media:
(i) Twisted Pair Cable:
- Features: Two insulated copper wires twisted together in pairs, often surrounded by a protective sheath.
- Mechanisms: Signals are transmitted through the copper wires, with the twisting helping to reduce interference from external sources.
- Advantages: Inexpensive, widely available, and can transmit data over short to medium distances.
- Limitations: Susceptible to interference and attenuation, which limits their use for longer distance transmissions.
(ii) Microwaves:
- Features: Electromagnetic waves with frequencies between 1 GHz and 300 GHz, often used for high-speed wireless communication.
- Mechanisms: Signals are transmitted through the air via antennas, with the waves traveling in straight lines from transmitter to receiver.
- Advantages: Can transmit records over lengthy distances, require minimum infrastructure, and can be used for excessive-pace statistics switch.
- Limitations: Susceptible to interference from physical objects, weather, and other wireless signals, which can impact data transmission quality.
(iii) Infrared:
- Features: Electromagnetic waves with frequencies higher than those of visible light, often used for short-range wireless communication.
- Mechanisms: Signals are transmitted through the air as bursts of light via infrared transmitters and receivers.
- Advantages: Can transmit data over short distances without requiring wires or cables, and is often used in remote controls and similar devices.
- Limitations: Require a clear line of sight between transmitter and receiver, can be disrupted by other sources of light, and cannot penetrate solid objects.
Data transmission media: