Fotis has connected his laptop to his tablet PC using an 802.11ac connection. What wireless network mode has he used to connect these devices?

Fotis is using ad hoc mode, which directly connects two clients. It can be easy to confuse this with stand-alone mode, which connects clients using a wireless access point but not to wired resources like a central network. Infrastructure mode connects endpoints to a central network, not directly to each other. Finally, wired extension mode uses a wireless access point to link wireless clients to a wired network.