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Computernetwerken

Computernetwerken. ISO / OSI referentiemodel O pen S ystem I nterconnection. zeven lagen. http://en.wikipedia.org/wiki/OSI_model. Physical layer. Kabel, stekkers, topologie, spanningen. Voorbeelden : RS485, Ethernet, glasvezel. Transportmedium twisted pair. Transportmedium Coax.

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Computernetwerken

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  1. Computernetwerken Security Technology 2007-2007-PICT les 1

  2. ISO / OSI referentiemodelOpen System Interconnection zeven lagen http://en.wikipedia.org/wiki/OSI_model Security Technology 2007-2007-PICT les 1

  3. Physical layer Kabel, stekkers, topologie, spanningen Voorbeelden : RS485, Ethernet, glasvezel Security Technology 2007-2007-PICT les 1

  4. Transportmedium twisted pair Security Technology 2007-2007-PICT les 1

  5. Transportmedium Coax Security Technology 2007-2007-PICT les 1

  6. Transportmedium glas Security Technology 2007-2007-PICT les 1

  7. Baseband/broadband Security Technology 2007-2007-PICT les 1

  8. Netwerktopologie bus head-end node ring ster Security Technology 2007-2007-PICT les 1

  9. Ethernet (oude standaard) 10Base-5physical layer 50 Ohm 10 Mbit/sec (baseband) Security Technology 2007-2007-PICT les 1

  10. Vampier-tap Security Technology 2007-2007-PICT les 1

  11. Ethernet (thin) 10Base-2 physical layer Security Technology 2007-2007-PICT les 1

  12. Ethernet (UTP) 10Base-Tphysical layer Hub = naaf Security Technology 2007-2007-PICT les 1

  13. Segmentation, VLANs Security Technology 2007-2007-PICT les 1

  14. data link layer Toegang, arbitratie Voorbeelden : Ethernet, token passing Security Technology 2007-2007-PICT les 1

  15. Carrier Sense Multiple Access Security Technology 2007-2007-PICT les 1

  16. Collision Detect CSMA/CD (ANSI/IEEE 802.3 – 1985) Institute of Electrical and Electronics Engineers IEEE Security Technology 2007-2007-PICT les 1

  17. Manchester-encoding Security Technology 2007-2007-PICT les 1

  18. Ethernetpakket octet = byte Start Frame Delimiter; DeSTination, SouRCe, LengTh Security Technology 2007-2007-PICT les 1

  19. Kabellengte MAC address = Media Access Control address 10 Mb/sec => 100 nsec per bitcel snelheid in coax is 2/3 x lichtsnelheid => 2/3 (3.108) = 2.108 m/s in 100 nsec 20 meter; ergo één bit is 20 meter lang Security Technology 2007-2007-PICT les 1

  20. Ethernet kabellengte één segment max. 500 m en max. 5 segmenten max 100 transceiver per segment met minimaal 2,5 m afstand (5 x 500) / 20 = 125 bits Security Technology 2007-2007-PICT les 1

  21. Repeater (!= router/bridge) Security Technology 2007-2007-PICT les 1

  22. Ethernet standards • The 10Base-T system operates at 10 Mbps and uses baseband transmission methods • 100BASE-T 100 Mbps 100BASE-T. Because it is 10 times faster than Ethernet, it is often referred to as Fast Ethernet. • 100BASE-TX: two pairs of high-quality twisted-pair wires • 100BASE-T4: four pairs of normal-quality twisted-pair wires • 100BASE-FX: fiber optic cables • Gigabit 1000BASE-?? • 10Gbit (glas) Security Technology 2007-2007-PICT les 1

  23. Token-ring Security Technology 2007-2007-PICT les 1

  24. Bitpatronen bitstuffing Pakket Security Technology 2007-2007-PICT les 1

  25. Token Ring met wire centre Security Technology 2007-2007-PICT les 1

  26. Token-busMAP : Manufacturers Automation Protocol Token bus is token ring over a virtual ring on a coaxial cable. Security Technology 2007-2007-PICT les 1

  27. Network layer routing Voorbeeld : IP Security Technology 2007-2007-PICT les 1

  28. Data encapsulation Security Technology 2007-2007-PICT les 1

  29. IP header http://www.freesoft.org/CIE/Course/Section3/7.htm Security Technology 2007-2007-PICT les 1

  30. IP4 addres format Security Technology 2007-2007-PICT les 1

  31. IP4 addres classes Security Technology 2007-2007-PICT les 1

  32. IP4 addres classes Security Technology 2007-2007-PICT les 1

  33. Gateway A node on a network that serves as an entrance to another network. Security Technology 2007-2007-PICT les 1

  34. LAN/WAN Security Technology 2007-2007-PICT les 1

  35. Bridges en Routers Security Technology 2007-2007-PICT les 1

  36. VPN : Virtual Private Network Security Technology 2007-2007-PICT les 1

  37. Transport layer Multiplexing, reliability Voorbeeld : TCP, UDP Security Technology 2007-2007-PICT les 1

  38. Verbinding leggen Pakket (datagram) circuit (virtueel) Security Technology 2007-2007-PICT les 1

  39. Data encapsulation Security Technology 2007-2007-PICT les 1

  40. TCP header http://www.freesoft.org/CIE/Course/Section4/8.htm Security Technology 2007-2007-PICT les 1

  41. Draadloze netwerken • IrDA (Infrared Data Association) • point to point • binnen gezichtsveld (licht) • korte afstand (meters) • 9600 bps tot 4 Mbps • Bluetooth • WLAN (Wireless LAN) IEEE 802.11 Security Technology 2007-2007-PICT les 1

  42. Draadloze netwerken • IrDA (Infrared Data Association) • Bluetooth • WLAN (Wireless LAN) IEEE 802.11 Security Technology 2007-2007-PICT les 1

  43. IrDa • point to point • binnen gezichtsveld (licht) • korte afstand (meters) • 9600 bps tot 4 Mbps Security Technology 2007-2007-PICT les 1

  44. Bluetooth Deense Vikingkoning (10e eeuw) wist Denemarken en Noorwegen te verenigen • Laag energieverbruik • Lage complexiteit • Lage kostprijs • 2,4 GHz band (magnetron) • 1 Mbps (721 Kbps) Security Technology 2007-2007-PICT les 1

  45. Bluetooth-netwerken Maximaal 6 slaves in een piconet Security Technology 2007-2007-PICT les 1

  46. Twee piconets in een scatternet Security Technology 2007-2007-PICT les 1

  47. WLAN met Access point Wireless ethernet (CDMA/CA) Security Technology 2007-2007-PICT les 1

  48. bestudeer hoofdstuk 15 Security Technology 2007-2007-PICT les 1

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