Final answer:
A wireless computer that connects to an AP before other devices is in infrastructure mode. This mode offers a stable connection through an AP, different from ad-hoc, mesh, or bridge modes.
Step-by-step explanation:
When a wireless computer connects to an Access Point (AP) before it connects with other devices, it is operating in infrastructure mode. This mode is used when devices communicate through an AP to a wired network or the internet, ensuring a stable and managed wireless connection. In contrast, ad-hoc mode allows direct communication between wireless devices without the use of an AP, while mesh mode involves the creation of a network where each node cooperates in the distribution of data across the network. Finally, bridge mode is used by APs and routers to connect different network segments.