The Ethernet Data Packet Format
Ethernet Data Frame – old/original format used
Preamble
8 Byte
| Destination | Source | Frame | Frame | FCS |
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| Address | Address | Type | User Data | Checksum |
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| 6 Byte | 6 Byte | 2 Byte | 46 – 1500 Byte | 4 Byte | |
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IEEE 802.3 Data Frame
| SOF | Destination | Source | Length | Frame |
| FCS |
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| Address | Address | Type | User Data | Checksum | ||
Preamble |
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| 2/6 Byte | 2 Byte | 46 – 1500 | Byte | 4 Byte |
7 Byte 1 Byte 2/6 Byte | |||||||
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DSAP
SSAP
Control
Data
1 Byte 1 Byte ½ Byte
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