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Ethernet is now the dominant LAN
technology in the world. Ethernet is not one technology but a
family of LAN technologies and may be best understood by using the
OSI reference model. All LANs must deal with the basic issue of
how individual stations (nodes) are named, and Ethernet is no
exception. Ethernet specifications support different media,
bandwidths, and other Layer 1 and 2 variations. However, the basic
frame format and addressing scheme is the same for all varieties
of Ethernet.
For multiple stations to access
physical media and other networking devices, various media access
control strategies have been invented. Understanding how network
devices gain access to the network media is essential for
understanding and troubleshooting the operation of the entire
network.
Students completing this module should be able to:
- Describe the basics of Ethernet
technology.
- Explain naming rules of Ethernet
technology.
- Define how Ethernet and the OSI
model interact.
- Describe the Ethernet framing
process and frame structure.
- List Ethernet frame field names
and purposes.
- Identify the characteristics of
CSMA/CD.
- Describe the key aspects of
Ethernet timing, interframe spacing and backoff time after a
collision.
- Define Ethernet errors and
collisions.
- Explain the concept of
auto-negotiation in relation to speed and duplex.
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