A wireless network is a computer network that connects nodes using wireless data connections. A wireless local area network (WLAN) connects devices over short distances through an access point for internet access. There are three main steps to configure wireless settings: 1) check for a wireless adapter, 2) set up the modem and internet connection, and 3) position the wireless router. It is important to secure the wireless network by changing default passwords, setting up a security key, and using a secure protocol like WPA2 to protect against unauthorized access.