Understanding the naming convention is crucial for identifying the capabilities of this specific binary:
Support for 802.11a/b/g wireless LAN standards through integrated modules. Technical Specifications IOS 15.2 for 2800 Series - Cisco Community c2800nm adventerprisek9 mz 152 1 link
The adventerprisek9 feature set is one of the most comprehensive packages available for Cisco routers. It is designed for large enterprise core or edge deployments requiring a wide variety of protocol support. c2800nm adventerprisek9 mz 152 1 link