Cisco Aironet 2800 Series Access Points, Getting Started Guide
The firmware file naming often looks like: AIR-AP2800-K9-ME-8-10-185-0.tar airap2800k9me851820tar portable
If you are analyzing a suspicious file named exactly like this: Treat it as an – extract only in a sandboxed Linux environment using tar -xvf and inspect with hexdump -C . Cisco Aironet 2800 Series Access Points, Getting Started