<page_title> Subnetwork Access Protocol </page_title> <section_title> Use </section_title> <table> <cell> OUI <col_header> SNAP extension </col_header> <row_header> DSAP </row_header> <row_header> SSAP </row_header> <row_header> Control </row_header> </cell> <cell> Protocol ID <col_header> SNAP extension </col_header> <row_header> DSAP </row_header> <row_header> SSAP </row_header> <row_header> Control </row_header> <row_header> OUI </row_header> </cell> <cell> 3 octets <col_header> SNAP extension </col_header> <col_header> OUI </col_header> </cell> <cell> 2 octets <col_header> SNAP extension </col_header> <col_header> Protocol ID </col_header> </cell> </table>
The SNAP header consists of a 3-octet organizationally unique identifier (OUI) followed by a 2-octet protocol ID.