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Guided Transmission Media

Guided transmission media refers to communication channels that are confined to a specific path or
medium. Different types of guided transmission media are as follows:

Twisted Pair Cable
It consists of two insulated copper wires twisted together. This type of cable is commonly used for
telephone calls and to connect computers or tablets to the Internet.

Coaxial Cable

It contains a central conductor surrounded by an
insulator and a shield. Coaxial cables are used
to connect satellite dishes to TV receivers and to
connect cable modems to Internet service providers.
Fiber Optic Cable

It uses glass or plastic fibers to transmit light pulses. Fiber optic cables are used to provide very fast
Internet connections and are capable of transmitting data over long distances with minimal signal loss.

Unguided Transmission Media

Unguided transmission media refers to wireless communication systems where the data is transmitted
through the air or space without the need for physical cables. The signals travel in the form of
electromagnetic waves, and these technologies allow devices to communicate over various distances.
Two popular examples of unguided media include:

Wi-Fi
Wi-Fi stands for Wireless Fidelity. It is a technology that allows devices to
connect to the Internet wirelessly using radio waves. It is commonly
used in homes, offices, and public spaces like cafes and airports to
provide Internet access. Wi-Fi enables devices such as laptops,
smartphones, and tablets to communicate with each other and access
the Internet without the need for wired connections.

Li-Fi

Li-Fi stands for Light Fidelity. It is a new wireless communication
technology that uses light to transmit data. Unlike Wi-Fi, which
uses radio waves, Li-Fi uses visible light, ultraviolet, or infrared light
to carry data. It is known for providing faster data transmission
speeds compared to traditional Wi-Fi. Li-Fi is particularly useful in
environments where radio frequency communication is not ideal, such as hospitals or aircraft, as light
signals do not interfere with sensitive equipment.

WIRELESS TRANSMISSION SERVICES

Wireless transmission services allow communication without the need for physical cables, using
electromagnetic waves to send data over varying distances.

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