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Week3 Lec3

Transmission Media and Network Topologies

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Week3 Lec3

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  1. Faculty of Computing And Information Technology, Indus University 1

  2. INDUS UNIVERSITY Faculty of Computing And Information Technology, Indus University

  3. Computer NetworksLecture: 3 Faculty of Computing And Information Technology, Indus University

  4. Lecture 3 and Week 3 • Transmission Media • Network Topologies

  5. TRANSMISSION MEDIA Faculty of Computing And Information Technology, Indus University

  6. Transmission Media Transmission media is a pathway that carries the information or data from sender to receiver. We use different types of cables or waves to transmit data. Data is transmitted normally through electrical or electromagnetic signals. Faculty of Computing And Information Technology, Indus University

  7. Transmission Media Guided Media or Bound Transmission Media. Unguided Media or Unbound Transmission Media. Faculty of Computing And Information Technology, Indus University

  8. Guided Media Guided Media or Bound Transmission Media. Bound transmission media are the cables that have physical existence and are limited by the physical geography. Cable is the medium through which information usually moves from one network device to another. Popular bound transmission media in use are twisted pair cable, coaxial cable and fiber optical cable. Each of them has its own characteristics like transmission speed, effect of noise, physical appearance, cost etc. Faculty of Computing And Information Technology, Indus University

  9. Unguided Media Unguided Media or Unbound Transmission Media: Unbound transmission media are the ways of transmitting data without using any cables. This type of transmission is called Wireless communication. Nowadays wireless communication is becoming popular. Wireless LANs are being installed in office and college campuses. This transmission uses Microwave, Radio wave, Infra-red are some of popular unbound transmission media. Faculty of Computing And Information Technology, Indus University

  10. Media Cables Faculty of Computing And Information Technology, Indus University

  11. Guided Media Cable Cable is the physical medium or physical media through which information usually moves from one network device to another Guided Media Twisted-pair Coaxial Cable Optical Fiber Copper Glass/Plastic Faculty of Computing And Information Technology, Indus University

  12. Coaxial Cable Faculty of Computing And Information Technology, Indus University

  13. Coaxial Cable Coaxial cable called “coax” for short. Coaxial cable consists of a central copper core surrounded by an insulator, a braided metal shielding called braiding and an outer cover called the sheath or jacket. With time, however, twisted-pair and fiber-optic cabling have replaced coax in modern LANs. Faculty of Computing And Information Technology, Indus University

  14. Coaxial Historically, data networks have used two specifications to transmit data over coaxial cable: Thicknet –RG-6 is a larger-size cable than the lower-grade RG-59 cable. thicknet referred as 10BASE-5 Ethernet. The 10 represents the 10Mbps and the 5 represents the max length of 500m. RG-6 cable can be used for distribution of feeds from a satellite dish, cable TV service or rooftop antenna. Faculty of Computing And Information Technology, Indus University

  15. Coaxial Thinnet – RG-59 cable, thinner than thicknet and more flexible, referred to it as 10BASE-2. 10 is 10Mbps and 2 is 200m max length (Supports 185m). The RG-59 coaxial cable is used for transmitting power signals for video systems such as cable television. Faculty of Computing And Information Technology, Indus University

  16. BNC and BNC-T Bayonet Neill–Concelman Faculty of Computing And Information Technology, Indus University

  17. Twisted Pair Cable A cable made by intertwining two separate insulated wires together. Modern networks typically use cables that contain four wire pairs. There are two types of Twisted Pair Cable Unshielded Twisted Pair (UTP) Cable Shielded Twisted Pair (STP) Cable Faculty of Computing And Information Technology, Indus University

  18. Twisted Pair Faculty of Computing And Information Technology, Indus University

  19. UTP Cable UTP cabling consists of one or more insulated wire pairs encased in a plastic sheath. UTP does not contain additional shielding for the twisted pairs. UTP is less expensive and less resistant to noise than STP. Faculty of Computing And Information Technology, Indus University

  20. STP Cable STP cable consists of twisted wire pairs that are not only individually insulated but also surrounded by a shielding made of a metallic substance such as foil. The shielding acts as a barrier to external electromagnetic forces, thus affecting the signals travelling over the wire inside the shielding. Faculty of Computing And Information Technology, Indus University

  21. UTP Connector RJ-45 conductor data cable contains 4 pairs of wires each consists of a solid colored wire and a strip of the same color. There are two wiring standards for RJ-45 wiring: T-568A and T-568B. Although there are 4 pairs of wires, Ethernet uses only 2 pairs: Orange and Green. The other two colors (blue and brown) may be used for a second Ethernet line or for phone connections. The two wiring standards are used to create a cross-over cable (T-568A on one end, and T-568B on the other end), or a straight-through cable (T-568B or T-568A on both ends). Faculty of Computing And Information Technology, Indus University

  22. Good Jacket Length Properly Crimped Faculty of Computing And Information Technology, Indus University

  23. UTP Connector Faculty of Computing And Information Technology, Indus University

  24. Wiring Pattern Pin T-568B (Common) T-568A 1 Orange Stripe Green Stripe 2 Orange Green 3 Green Stripe Orange Stripe 4 Blue Blue 5 Blue Stripe Blue Stripe 6 Green Orange 7 Brown Stripe Brown Stripe 8 Brown Brown Faculty of Computing And Information Technology, Indus University

  25. Wiring Pattern Faculty of Computing And Information Technology, Indus University

  26. This is the Jack This is the Connector 568A Faculty of Computing And Information Technology, Indus University

  27. Wiring Pattern Faculty of Computing And Information Technology, Indus University

  28. Straight Through Cable Straight-through cables for… Switch to router Switch to PC or server Hub to PC or server Faculty of Computing And Information Technology, Indus University

  29. Crossover Cable Crossover cables for… Switch to switch Switch to hub Hub to hub Router to router PC to PC Router to PC Faculty of Computing And Information Technology, Indus University

  30. Rollover cable  Rollover cables are most commonly used to connect to a devices console port to make programming changes to the device. Unlike crossover and straight-wired cables, rollover cables are not intended to carry data but instead create an interface with the device. Faculty of Computing And Information Technology, Indus University

  31. References & Resources • All topics are covered from Course Reference Book Data Communication and Computer Networks, 5th Edition by Behrouz A. ForouzanYear 2013. • The topics of Third Lecture are covered from Seventh Chapter of the mentioned book. Faculty of Computing And Information Technology, Indus University

  32. Thank You Faculty of Computing And Information Technology, Indus University

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