Ethernet adapter frame headers
An Internet Protocol (IP) or Address Resolution Protocol (ARP) frame header for the Ethernet adapter is composed of these three fields.
| Field | Length | Definition |
|---|---|---|
| DA | 6 bytes | Destination address. |
| SA | 6 bytes | Source address. If bit 0 of this field is set to 1, it indicates that routing information (RI) is present. |
| Type | 2 bytes | Specifies whether the packet is IP or ARP. The type number values are listed below. |
Type field numbers:
| Item | Description |
|---|---|
| IP | 0800 |
| ARP | 0806 |