Lab

Ethernet II

← Protocol page

Ethernet II packet builder

Hex preview

Two-way sync: edit fields or hex. Educational encoding — not a full on-wire encoder.

Ethernet II fields

Hover a field for description.

Checksum sandbox

Ethernet FCS

Bytes

6

CRC-32 (Ethernet FCS)

DD EB E1 C8

0xDDEBE1C8 · IEEE polynomial reflected; shown big-endian wire order.