What is WiFi Access Point (AP)?

In computer networking, a wireless access point (AP) is a device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards. The AP usually connects to a router (via a wired network) as a standalone device, but it can also be an integral component of the router itself. An AP is differentiated from a hotspot, which is the physical space where the wireless service is provided.

For more information, please refer to the original article on Wikipedia: 

https://en.wikipedia.org/wiki/Wireless_access_point