Wi-Fi is a popular wireless networking technology that uses radio waves to provide wireless high-speed internet and network connections. The mainstay of any wireless network is an Access Point. Access Point broadcasts a wireless signal so that computers can detect and connect to. These computers and devices must be equipped with wireless network adapters to be able to connect to the access point and join the wireless network. Also Wi-Fi compatible devices can connect to the internet via a WLAN.
Wi-Fi is more vulnerable to eavesdropping than wired networks because anyone within range with a wireless modem can attempt to access the network. Hotspot coverage can be as you desire. It can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points.
You only need to be within the range of the Wi-Fi network to enable Wi-Fi. Most business networks protect sensitive data and systems by attempting to disallow external access. Enabling wireless connectivity reduces security if the network uses inadequate or no encryption.
Wi-Fi supports a lot of applications and devices such as major operating systems, home networks, video game consoles, PDAs mobile phones and any type of consumer electronics.