Hi Samir,
It depends on the part #. The Cisco Aironet 1130AG Series may be ordered with Cisco IOS Software to operate as an autonomous AP or with Lightweight Access Point Protocol (LWAPP). Check out the part numbers (Note LAP1131AG for lightweight).
AIR-AP1131AG-x-K9 Cisco IOS Software 802.11a/g Non-modular IOS AP; Integrated Antennas
AIR-LAP1131AG-x-K9 LWAPP 802.11a/g Non-modular LWAPP AP: Integrated Antennas
From this doc;
http://www.cisco.com/en/US/products/ps6087/products_data_sheet0900aecd801b901c.html
If you ended up with the Autonomous AP, it can be converted to LWAPP using the LWAPP conversion tool.
Hope this helps!
Rob
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