LLC Type 2, 3

Type 2: Acknowledged connection oriented (on 802.5)Provides flow control, error control. Uses SABME (Set asynchronous balanced mode), UA (unnumbered ack), DM (disconneced mode), DISC (disconnect)

Type 3: Acknowledged connectionlessUses one-bit sequence numberAC command PDUs acked by AC response PDUs

Type 2: Acknowledged connection oriented (on 802.5) Provides flow control, error control. Uses SABME (Set asynchronous balanced mode), UA (unnumbered ack), DM (disconneced mode), DISC (disconnect)