1. 1 Introduction 4 Communication media is a path between the transmitter and the receiver 4 Three types: conductive, optical cable, wireless. Chapter 5 Communication Channels and Media

2. 2 5.1 Conductive Media 4 The types of conductors used for networking are UTP, STP and Coaxial 4 UTP: contains several pair of wires 4 Uses RJ-45 or RJ-11 connectors 4 Divided into CAT-1 through CAT-5 4 STP: improve the effect of noise. Chapter 5 Communication Channels and Media

3. 3 Coaxial Cable 4 Used for transmitting high-speed information over long distances 4 ThinNet or 10Base2: RG-58 (BNC connector) 4 ThickNet or 10Base5: RG-11 (DIX connector) 4 CATV: RG-59. 5.1 Conductive Media

4. 4 ThinNet 5.1 Conductive Media

5. 5 ThickNet 5.1 Conductive Media

6. 6 5.2 Fiber-Optic Cable 4 Fiber-optic cable transfers information in the form of light 4 LED, ILD: convert a digital signal to an optical signal for transmitting information over optical cable 4 PIN : convert the light signals into electrical signals. Chapter 5 Communication Channels and Media

7. 7 Type of Fiber-Optic cable 4 SMF: use only one ray of the light source (ILD) 4 MMF: more than one light (LED) 4 MMF step index (Fig 5.7) 4 MMF grade index (Fig 5.8) 4 Connector: SC, ST, MT-RJ. 5.2 Fiber-Optic Cable

8. 8 5.3 Wireless Transmission 4 Use microwave, radio, infrared light signals to transmit information 4 Terrestrial and Satellite System. Chapter 5 Communication Channels and Media