Media (kỹ THUẬT TRUYỀN số LIỆU SLIDE)

Transmission Media Physical Layer Classes of Transmission Media Guided Media  Provide a conduit from one device to another  Include  twisted-pair cables  coaxial cables  fiber-optic cables Guided Media: Copper Media Twisted-Pair Cable UTP and STP Cables UTP – Unshielded Twisted Pair STP –Shielded Twisted Pair Categories of UTP/STP Cables Categories of UTP/STP Cables Category Bandwidth Digital/Analog Use very low Analog Telephone < MHz Analog/digital 4Mbps token ring 16 MHz Digital 10-100 Mbps Ethernet 20 MHz Digital 16 Mbps token ring 100 MHz Digital 100 – 1000 Mbps Ethernet Digital 100 – 1000 Mbps Ethernet Digital – 10 Gbps Ethernet Digital – 10 Gbps Ethernet Digital 10 Gbps Ethernet Digital 40-100 Gbps Ethernet 5E 6A 7A 100 MHz 250 MHz 500 MHz 600 MHz 1000 MHz UTP Connectors RJ – Registered Jack 10 Guided Media: Optical Media Optical Fiber  Based on physics of light 17 Optical Fiber 18 Propagation Modes 19 Fiber Types 20 Fiber Construction 21 Fiber-Optic Cable Connectors 22 Optical Fiber Performance 23 Unguided Media Unguided Media: Wireless  Transport electromagnetic waves without using a physical conductor  Radio Waves  Microwaves  Infrared  Often referred to as wireless communication 25 Electromagnetic Spectrum 26 Propagation Methods 27 Bands 28 Antennas Omni-directional Antenna Unidirectional Antennas 29 Wireless Transmission Waves used for multicast/broadcast communications, used for unicast communication such as cellular used for short-range communication in a such as radio and television telephones, satellite networks, closed area using line-of-sight and wireless LANs propagation 30 ... Classes of Transmission Media Guided Media  Provide a conduit from one device to another  Include  twisted-pair cables  coaxial cables  fiber-optic cables Guided Media: Copper Media Twisted-Pair... Bayonet Neil-Concelman  Used with coaxial cables 14 Performance of Coaxial Cables 15 Guided Media: Optical Media Optical Fiber  Based on physics of light 17 Optical Fiber 18 Propagation Modes 19... Fiber Construction 21 Fiber-Optic Cable Connectors 22 Optical Fiber Performance 23 Unguided Media Unguided Media: Wireless  Transport electromagnetic waves without using a physical conductor  Radio