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          Local Area Networks<br /><ul><li>They are the means of sharing files and common resources such as printers. They...
LANs started out as narrow-range systems, but the enterprise network of today has evolved into a network of interconnected...
By definition, a LAN is a network dedicated to a single organization, limited in range, and connected by a common communic...
 A restricted range.
 share a common transmission        medium.
 A network operating system (NOS)</li></li></ul><li>NIC has the following functions:<br /><ul><li>Physical interface to th...
 Monitors the busy/idle status of the network.
Buffers/device to the speed of the network
Transmitted data stream into frames for transmission
On the network
Errors and collisions</li></li></ul><li>LANs can be classified according to four cruteria:<br /><ul><li> Topology
 Access method
 Modulation method
 Transmission medium</li></li></ul><li>                    Topology<br />
            Access Methods<br />LAN access methods: contention or noncontention.<br />CSMA/CD<br />
       Modulation Methods<br /> In the first,  baseband,<br /> other method, broadband,<br /><ul><li>broadband</li></li></...
 coaxial
cable
 fiber optics
 radio, and infrared</li></li></ul><li>802.1 Overview document containing the reference model, and glossary<br />802.1b St...
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2010fall ch10 gantuya

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J.EL310

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2010fall ch10 gantuya

  1. 1.
  2. 2. Local Area Networks<br /><ul><li>They are the means of sharing files and common resources such as printers. They provide access to wide area networks, host computers, and servers.
  3. 3. LANs started out as narrow-range systems, but the enterprise network of today has evolved into a network of interconnected LANs.
  4. 4. By definition, a LAN is a network dedicated to a single organization, limited in range, and connected by a common communication technology. </li></li></ul><li> local area network technology<br />A LAN has the following characteristics:<br /><ul><li> High speed
  5. 5. A restricted range.
  6. 6. share a common transmission medium.
  7. 7. A network operating system (NOS)</li></li></ul><li>NIC has the following functions:<br /><ul><li>Physical interface to the transmission medium.
  8. 8. Monitors the busy/idle status of the network.
  9. 9. Buffers/device to the speed of the network
  10. 10. Transmitted data stream into frames for transmission
  11. 11. On the network
  12. 12. Errors and collisions</li></li></ul><li>LANs can be classified according to four cruteria:<br /><ul><li> Topology
  13. 13. Access method
  14. 14. Modulation method
  15. 15. Transmission medium</li></li></ul><li> Topology<br />
  16. 16. Access Methods<br />LAN access methods: contention or noncontention.<br />CSMA/CD<br />
  17. 17. Modulation Methods<br /> In the first, baseband,<br /> other method, broadband,<br /><ul><li>broadband</li></li></ul><li> Transmission Media<br />All of the transmission media used in other networks:<br /><ul><li>twisted pair wire
  18. 18. coaxial
  19. 19. cable
  20. 20. fiber optics
  21. 21. radio, and infrared</li></li></ul><li>802.1 Overview document containing the reference model, and glossary<br />802.1b Standard for LAN/WAN management, Virtual bridged LANs<br />802.2 Logical link control<br />802.3 100 mb/s contention bus standard 10/100-Base-T<br />802.3 Gigabit Ethernet, Power over Ethernet (FOIRL) Full duplex Ethernet<br />802.4 Token bus standard<br />802.5 Token ring standard 4 Mbps over unshielded twisted pair<br />802.6 Metropolitan area network DQDB<br />802.7 Broadband LAN recommended practices<br />802.8 Fiber optic contention network practices<br />802.9 Integrated voice and data LAN<br />802.10 Interoperable LAN Security<br />802.11 Wireless LAN standard<br />802.12 Contention bus standard 100VG AnyLAN<br />
  22. 22. 802.3 Ethernet standard<br />
  23. 23. 802.3 ETHERNET STANDARDS <br />Fast Ethernet<br />LAN Traffic Prioritization<br />Gigabit Ethernet<br />10 Gigabit Ethernet<br />Power over Ethernet (PoE)<br />
  24. 24. Power over Ethernet (PoE)<br /><ul><li> Class 0: (the default, when a device’s class is unknown) 15.4 W
  25. 25. Class 1: 4 W
  26. 26. Class 2: 7 W
  27. 27. Class 3: 15.4 W</li></li></ul><li> LAN ARCHITECTURES<br />
  28. 28.
  29. 29. Bridging and Switching<br />
  30. 30. Switching Technology<br />
  31. 31. NETWORK OPERATING SYSTEMS<br /><ul><li>Application program to the computers operating system
  32. 32. Information transfer between the network and the server
  33. 33. Manage security on the network
  34. 34. Directly attached to the users personal computers.
  35. 35. Network administrator can manage the network.</li></li></ul><li> Peer-to-Peer Networks<br /><ul><li>inherent in Microsoft’s Windows printers, disk etc…
  36. 36. a printer, data or print job, others are</li></ul> attached to their computer<br /><ul><li>all files are storedon a server,
  37. 37. user’s disk, modify and save it to their own hard disk.</li></li></ul><li> LAN APPLICATION ISSUES<br /><ul><li> Security
  38. 38. Fault Tolerance
  39. 39. Network Management
  40. 40. Internetworking
  41. 41. Infrastructure Planning
  42. 42. Backbone Architecture
  43. 43. Network Speed and Throughput</li></li></ul><li>Thank youfor your attention.<br />

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