In cybersecurity and network administration, a .cap file is a packet capture file containing raw data from a network.

: They are typically renamed (e.g., P9X79.CAP ) and loaded via a USB drive using the ASUS EZ Flash utility. 3. Enterprise Software (HPE / Micro Focus)

For users of ASUS motherboards, a .cap (Capsule) file is the standard format for BIOS updates.