Ethernet

Ethernet is the dominant family of wired LAN technologies (IEEE 802.3). Frames carry payloads such as IPv4/IPv6; ARP operates alongside IPv4 on Ethernet-like links. Full IEEE standard text is not redistributed here — use official IEEE sources for normative requirements.

OSINT / IR relevance

• MAC addresses (OUIs) identify vendor class of NICs
• Switch CAM tables and DHCP logs pair IP ↔ MAC for asset inventory