Final answer:
A wireless computer directly connecting to another wireless computer in a peer-to-peer fashion operates in Ad hoc mode.
Step-by-step explanation:
When a wireless computer uses a peer-to-peer connection to directly connect to another wireless computer, it is operating in Ad hoc mode. The Ad hoc mode allows wireless devices to connect directly to each other without the need for a wireless access point or router. This is in contrast to Infrastructure mode, where devices communicate through a central wireless access point or router. Some other network types like Hot spot, Wi-Fi (which is a general term for wireless networking), and Personal area network (typically for Bluetooth or other short-range connections) are structured differently.