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Ethernet Address Format
First 3 bytes indicate manufacturer:
- 3Com: 00-00-86, 00-20-AF, 00-60-8C, 02-60-8C
- Intel: 00-AA-00
- Etc.
Last 3 bytes indicate network interface card (NIC)
Broadcast address: FF-FF-FF-FF-FF-FF
Multicast address range: 01-00-53-0X-XX-XX