1CSNW1

1CSNW1 – week 5
OSI Reference Model (herh.)
All
People
Seem
To
Need
Data
Processing
Bron: DevCentral
Thick Ethernet (10BASE5)
(physical layer)
50 Ohm
10 Mbit/sec (baseband)
Vampier tap
Thin Ethernet (10BASE2)
(physical layer)
UTP Ethernet 10BASE-T
(physical layer)
hub = naaf
Netwerkkaart (Thin Ethernet en UTP)
Bron: Wikipedia
CSMA/CD (1)
Carrier Sense Multiple Access
CSMA/CD (ANSI/IEEE 802.3)
CSMA/CD (2)
Collision Detection
Manchester Encoding
Ethernetpakket
octet = byte
Start Frame Delimiter;
DeSTination;
SouRCe;
Length/Type;
Media Access Control (MAC) address

MAC48 (6 octetten)
248 = 281.474.976.710.656 mogelijke MAC adressen

Voorbeeld:
00:C0:0C:03:A3:44

FF:FF:FF:FF:FF:FF als bestemming dan
broadcast
Ethernet kabellengte (1)
- 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
Ethernet kabellengte (2)
- Eén segment max. 500 m en max. 5 segmenten
- Max. 100 transceiver per segment met minimaal 2,5 m afstand
- Dus (5 x 500) / 20 = 125 bits over de totale lengte van de kabel
Ethernet Standards


The 10BASE system operates at 10 Mbps and uses
baseband transmission methods
100BASE 100 Mbps. Because it is 10 times faster
than Ethernet, it is often referred to as Fast Ethernet.

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1000BASE Gigabit ethernet

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100BASE-TX: two pairs of high-quality twisted-pair wires
100BASE-T4: four pairs of normal-quality twisted-pair wires
100BASE-FX: fiber optic cable
1000BASE-T: category 5e copper cabling
1000BASE-SX: fiber optic cable
1000BASE-LX: longer distances over single-mode fiber
10GBASE (emerging technology)
Netwerkkoppeling (herh.)
Application
Application
Transport
Transport
Network
Network
Data Link
Physical
Radio
Network
Network
Data Link
Data Link
Data Link
Physical
Physical
Physical
UTP
Bron: Jochen Schiller
Netwerk met VLANs
Bron: CISCO
VLAN configuratie
Twee switches dmv trunk verbonden
802.1Q Frame Format
(VLAN tagging)
Netwerk met Layer-3 Switch
Practicum Ethereal (Wireshark)
Bronnen

Ethernet (Wikipedia)
IEEE Standards Association
CISCO Systems, Inc.
Wireshark site

Jochen Schiller, “Mobiele Communicatie”, (Pearson

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Opdrachten
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Bestudeer hfdst. 15.3
Maak opgaven 15.5 en 15.6