IB Computer Science Topic A2.3.2: Compare Types of Media for Data Transmission Notes

Wired Transmission: Fibre Optic Cables

Fibre optic cables use pulses of light to transmit data through glass or plastic fibers.

1. Bandwidth: Extremely high, supporting gigabits per second.
2. Installation Complexity: Requires specialized tools and skills.
3. Cost: High installation cost but low maintenance.
4. Range: Long-distance transmission with minimal signal loss.
5. Interference Susceptibility: Immune to electromagnetic interference (EMI).
6. Attenuation: Very low, maintaining signal strength over long distances.
7. Reliability: Highly reliable with low latency.
8. Security: Difficult to intercept, enhancing data security.

Wired Transmission: Twisted Pair Cables

Twisted pair cables use pulses of electricity to transmit data through copper wires twisted together.

1. Bandwidth: Moderate, sufficient for general office and home use.
2. Installation Complexity: Easy to install and maintain.
3. Cost: Relatively inexpensive, especially unshielded twisted pair (UTP).
4. Range: Limited without repeaters to boost the signal.
5. Interference Susceptibility: Susceptible to EMI, though shielded twisted pair (STP) offers better protection.
6. Attenuation: Higher than fibre optics, requiring signal boosters for longer distances.
7. Reliability: Generally reliable but impacted by EMI.
8. Security: Interception is challenging, but not as secure as fibre optics.

Wireless Transmission

Wireless transmission uses electromagnetic waves (e.g., radio frequencies) to send data.

1. Bandwidth: Limited compared to wired options, affected by distance and interference.
2. Installation Complexity: Simple, involving the setup of access points.