Concepts

This section explains the Ethernet and IEEE concepts represented by EtherLyzer.

• MAC Addresses
  • First-octet flags
    • I/G — Individual/Group
    • U/L — Universal/Local
  • Possible combinations
• IEEE Registries
  • Supported registry types
  • EUI-48 assignment sizes
  • MA-L
  • MA-M
  • MA-S
  • IAB
  • CID
  • EtherType
  • Local registry data
• MAC Validation
  • Validation masks
  • Examples
    • Missing digit
    • Overflow
    • Invalid character and missing digit
    • Lenient substitution