An access point is a networking hardware device that creates a wireless local area network (WLAN) and allows other Wi-Fi devices to connect to a wired network. It connects to a wired router, switch, or hub via an Ethernet cable and projects a Wi-Fi signal to a designated area. An access point can be a standalone device or an integral component of a wireless router. It is different from a hotspot, which is a physical location where Wi-Fi access is available.

Access points are commonly used in large office spaces with heavy traffic, where many APs are required to provide an internet connection to support thousands of users. They can handle over 60 simultaneous connections each, and users can roam freely from room to room without experiencing network interruptions. When a wireless device moves beyond the range of one AP, it is handed over to the next AP.

Wireless access has special security considerations, and many wired networks base the security on physical access control, trusting all the users on the local network. However, if wireless access points are connected to the network, anybody within range of the AP can attach to the network. Therefore, wireless traffic encryption is the most common solution to secure wireless access points.

In summary, an access point is a device that creates a wireless local area network and allows other Wi-Fi devices to connect to a wired network. It is commonly used in large office spaces with heavy traffic, and it has special security considerations.