: Refers to the hardware platform group (Aironet 2700, 3700, and 4800 series).
: This is the functional identifier. In Cisco terminology: k9w7 indicates Autonomous (standalone) mode. k9w8 indicates Lightweight (controller-based) mode. 153-3.jpo : The software version (IOS 15.3(3)JPO). Ap3g3-k9w8-tar.153-3.jpo.tar
: If the AP complains about space, use the /overwrite option in the CLI command to delete the old image during the extraction process. : Refers to the hardware platform group (Aironet