Ethernet
- Baseband signaling.
- Linear or star-bus topology.
- Usually transmits at 10 Mbps with 100 Mbps possible.
- Uses CSMA/CD for traffic regulation.
- IEEE specification 802.3.
- Uses thicknet, thinnet or UTP cabling
- Media is passive => it draws power from the computer
Ethernet Frames
Ethernet breaks data into frames. A frame can be from 64 to 1,518 bytes long in total. The ethernet frame itself takes up 18 bytes, so the actual data can be from 46 to 1,500 bytes.
- Preamble: marks the start of a frame.
- Destination and Source: addressing information.
- Type: Identifies network layer protocol.
- CRC: error checking data.
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