What device provides physical connectivity to the Aruba Mobility Controller?

The correct choice is the Access Point. The Aruba Mobility Controller provides management and control for wireless networks, and Access Points are the devices that physically connect to this controller. They extend the network by allowing wireless devices to connect to the infrastructure managed by the Mobility Controller. The Access Points transmit and receive wireless signals, enabling mobile devices to connect to the network.

The other devices mentioned play different roles in a network. Switches are utilized for connecting wired devices within a local area network, while routers are used to direct data between different networks, including handling traffic between the local network and the internet. Firewalls serve to protect the network by controlling incoming and outgoing traffic based on predefined security rules. None of these functions directly relate to the physical connection between the Mobility Controller and the Access Points, making the Access Point the essential component for such connectivity.