Unguided Media (Wireless Media)
Unguided media, also known as wireless media, is a type of transmission media that does not use physical cables to transmit data signals in a computer network. Instead, it uses radio waves, infrared signals, or satellite signals to transmit data. In this article, we will discuss each type of unguided media in detail.
- Radio Waves
Radio waves are electromagnetic waves that have a frequency between 3 kHz and 300 GHz. Radio waves are used for wireless communication in networks such as Wi-Fi, Bluetooth, and mobile networks. Radio waves are transmitted through the air and can travel through obstacles such as walls, buildings, and trees. However, they can be affected by interference from other devices that use the same frequency.
- Infrared Signals
Infrared signals are electromagnetic waves that have a frequency between 300 GHz and 400 THz. Infrared signals are used for short-range communication in networks such as IrDA (Infrared Data Association) and TV remote controls. Infrared signals are transmitted through the air and require a direct line of sight between the transmitter and the receiver. They are also affected by interference from other sources of infrared signals such as sunlight.
- Microwave Signals
Microwave signals are electromagnetic waves that have a frequency between 1 GHz and 300 GHz. Microwave signals are used for wireless communication in networks such as microwave point-to-point links and satellite communication. Microwave signals can travel long distances and can penetrate buildings and other obstacles. However, they can be affected by interference from other devices that use the same frequency.
- Satellite Signals
Satellite signals are electromagnetic waves that are used for wireless communication in networks such as satellite television and satellite Internet. Satellite signals are transmitted from a satellite in orbit to a ground-based receiver. They can cover a wide geographic area and can be used in remote locations. However, they can be affected by atmospheric conditions such as rain, snow, and clouds.
Unguided media is an essential component of wireless networks. The type of unguided media used in a network can have a significant impact on the performance, reliability, and security of the network. Choosing the right type of unguided media is critical to ensure that the network meets its performance goals and can transmit data with minimal delay, loss, or interference. Network administrators should carefully evaluate the different types of unguided media available and choose the one that best fits their network requirements.