Question

Explain any three unguided media in detail.

Hint:

Radio waves are commonly used for wireless communication, while microwaves and infrared are ideal for more specific applications such as satellite communication and short-range communication, respectively.

Answer 1

Step 1: Understanding Unguided Media.
Unguided media, also known as wireless communication, refers to the transmission of data through air or space without the use of physical cables. These signals are broadcasted through electromagnetic waves, such as radio waves, microwaves, and infrared signals. Unguided media is used for wireless communication in networks, including mobile networks, Wi-Fi, satellite communication, and more.
Step 2: Types of Unguided Media.
1. Radio Waves: Radio waves are electromagnetic waves with frequencies ranging from 30 Hz to 300 GHz. They are widely used for radio and television broadcasts, as well as in wireless networks like Wi-Fi. Radio waves can travel long distances, making them ideal for broadcasting and mobile communications.
2. Microwaves: Microwaves are high-frequency electromagnetic waves (typically between 1 GHz and 100 GHz) used for point-to-point communication systems, such as satellite communication. Microwave signals are typically transmitted via line-of-sight communication, meaning the sender and receiver must be directly visible to each other.
3. Infrared (IR): Infrared waves have shorter wavelengths than microwaves and are typically used for short-range communication, such as remote controls, wireless keyboards, and other device-to-device communications. They operate in the frequency range of 300 GHz to 430 THz and are not effective over long distances or through walls.
Step 3: Conclusion.
Unguided media are essential for modern communication systems, offering flexibility and mobility. While they do not require physical cables, they may face challenges like interference and limited range.