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802.2

In 802.2 packets, the DLSAP corresponds to either

• The SSAP (in a DL_BIND_REQ, DL_BIND_ACK, or in the source address field of a DL_UNITDATA_IND primitive) or
• The DSAP (in a DL_UNITDATA_REQ or in the destination address field of a DL_UNITDATA_IND primitive)

If the DLSAP is 0xAA, then it must be followed by a 5-byte SNAP.