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2. Native Ethernet data link layer
2.1 CSMA: network access method
The access method on Ethernet is called CSMA/CD (Carrier Sense Multiple Access/ Collision Detection). It's a contention technique that doesn't give exclusive access to the channel (like polling or tokenization), but tries to avoid conflicts and uses them as a method of channel allocation.
CS (Carrier Sense): the ability to detect traffic on the channel (listen before speaking). If the station wishing to transmit notices that there is traffic on the network, it does not attempt to transmit, but waits until the channel is clear (figure 2 a ).
MA (Multiple Access): each...
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Native Ethernet data link layer
Communication protocols associated with Ethernet
Bibliography
Standardization
- Information Technology – Telecommunication & Information Exchange Between Systems – LAN/MAN – Specific Requirements – Part 3: Carrieir Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications - IEEE 802.3 - 2002
- Standards for Local and Metropolitan Area Networks : Virtual Bridged Local Area Networks - IEEE 802.1Q - 2003
- Information Technology – Generic wiring...
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