What is the Difference Between Guided Media and Unguided Media?

The main difference between guided and unguided media lies in the method they use to transmit signals. Guided media transmit signals through a physical medium, such as cables, while unguided media transmit signals wirelessly through the air. Here are some key differences between guided and unguided media:

Signal Transmission: In guided media, the signal energy is communicated via wires, while in unguided media, the signal energy is communicated through the air.
Direct Communication: Guided media is generally preferred when direct communication is required, such as point-to-point links or shared links with multiple connections. Unguided media is generally preferred for radio broadcasting in all directions.
Network Topologies: Guided media forms different network topologies, while unguided media forms continuous network topologies.
Signal Form: In guided media, the signals are in the form of current and voltage, whereas in unguided media, the signals are in the form of electromagnetic waves.
Examples: Examples of guided media include twisted pair wires, coaxial cables, and optical fiber cables. Examples of unguided media include microwave or radio links and infrared light.
Transmission Capacity: In guided media, the transmission capacity can be increased by adding more wires. However, unguided media does not have this capability.
Interference: Guided media are generally more immune to interference, as they are in cables. Unguided media, being wireless, are more susceptible to interference from other electronic devices and physical obstacles.
Security: Guided media provide better security as they are difficult to intercept without physical access. Unguided media are more vulnerable to eavesdropping.

In summary, guided media are used for wired transmission and provide better security, while unguided media are used for wireless transmission and are more susceptible to interference.