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De onderste lagen van het OSI model

De onderste lagen van het OSI model. Ethernet (standaard) 10Base-5 physical layer. 50 Ohm. 10 Mbit/sec (baseband). Vampier-tap. Ethernet (thin) 10Base-2 physical layer. Ethernet (UTP) 10Base-T physical layer. Hub = naaf. Carrier Sense Multiple Access. Collision Detect. CSMA/CD

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De onderste lagen van het OSI model

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  1. De onderste lagen van het OSI model Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  2. Ethernet (standaard) 10Base-5physical layer 50 Ohm 10 Mbit/sec (baseband) Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  3. Vampier-tap Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  4. Ethernet (thin) 10Base-2 physical layer Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  5. Ethernet (UTP) 10Base-Tphysical layer Hub = naaf Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  6. Carrier Sense Multiple Access Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  7. Collision Detect CSMA/CD (ANSI/IEEE 802.3 – 1985) Institute of Electrical and Electronics Engineers IEEE Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  8. Manchester-encoding Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  9. Ethernetpakket octet = byte Start Frame Delimiter; DeSTination, SouRCe, LengTh Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  10. 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 Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  11. 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 Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  12. 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) Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  13. Token-ring Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  14. Bitpatronen bitstuffing Pakket Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  15. Token Ring met wire centre Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  16. Token-busMAP Manufacturers Automation Protocol Token bus is token ring over a virtual ring on a coaxial cable. Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  17. 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 Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  18. 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) Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  19. Bluetooth-netwerken Maximaal 6 slaves in een piconet Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  20. Twee piconets in een scatternet Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  21. WLAN met Access point Wireless ethernet (CDMA/CA) Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  22. WLAN Wi-Fi (or Wi-fi, WiFi, Wifi, wifi), short for "Wireless Fidelity", is a set of standards for wireless local area networks (WLAN) based on the IEEE 802.11 specifications • 802.11a standard uses the 5 GHz band • 802.11b and 802.11g standards use the unlicensed 2.4 GHz band. Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

  23. Opdracht • bestudeer 15.3 t/m 15.7 • practicum Videofoon Hogeschool van Utrecht / Institute for Computer, Communication and Media Technology

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