The document identifies and describes different physical transmission cables and wireless transmission media. It discusses various cable types including unshielded twisted pair, shielded twisted pair, coaxial, and fiber optic cables. It also discusses wireless transmission media such as infrared and radio waves. The document categorizes transmission media into two broad categories: physical transmission media which uses cables, and wireless transmission media which transmits data via electromagnetic waves without cables.

1. MEDIUM

2. LEARNING OUTCOMES 3.2.2 Medium Identify various types of cables such as Unshielded Twisted Pair (UTP), Shielded Twisted Pair (STP), Coaxial and Fibre Optic Cable. Identify various types of wireless transmission media such as infrared, radio wave and satellite.

3. PHYSICAL TRANSMISSION MEDIA

4. CABLES AS A PHYSICAL TRANSMISSION MEDIUM Cables are used as a physical transmission medium. There are three types of cables used in transmitting electrical messages. They are: Twisted-Pair Cable - Two insulated copper wires that are twisted around each other. Each connection on twisted-pair requires both wires. Coaxial Cable - A cable consisting of a conducting outer metal tube that encloses and is insulated from a central conducting core, used primarily for the transmission of high-frequency signals. Fibre Optic Cable - Glass fibre used for laser transmission of video, audio and/or data.

5. Various types of cables Unshielded Twisted Pair (UTP), Shielded Twisted Pair (STP), Coaxial Fibre Optic Cable.

6. UTP and STP

7. Twisted-Pair Cable - Two insulated copper wires that are twisted around each other. Each connection on twisted-pair requires both wires. Two types of twisted-pair cable 1. STP 2. UTP

8. COAXIAL

9. Coaxial Cable - A cable consisting of a conducting outer metal tube that encloses and is insulated from a central conducting core, used primarily for the transmission of high-frequency signals.

10. FIBRE OPTIC

11. Fibre Optic Cable - Glass fibre used for laser transmission of video, audio and/or data.

12. TRANSMISSION MEDIA TWO BROAD CATEGORIES Physical transmission media 2. Wireless transmission media

13. Physical Transmission media Refers to material substances that can propagate waves and energy. waves are guided along a solid transmission medium. Example 1. connect PC to printer using parallel port or USB port. 2. connect PC to the same phone line for internet. 3. connect PC to PC using untwisted-pair cable

14. Wireless Transmission media Means data communication between network devices without using cables or cord, but by using radio frequency or infrared waves. Method of communication that uses electromagnetic waves rather than wire conductors to transmit data between devices. Waves are unguided and the transmission and reception are by means of antennas.

15. Cont… Wireless Transmission media Wireless data transmission is categorised into short, medium, and long range data transmission. Example: short range – bluetooth, infra red medium range – WiFi or Wireless LAN long range– 3G