A Wireless Local Area Network (WLAN) is a type of Local Area Network that allows computers, smartphones, tablets, and other devices to connect to a network without using physical cables. Instead of Ethernet cables, a WLAN uses wireless radio signals to transmit data between devices. It enables users to move freely within the network’s coverage area while remaining connected. Because of its flexibility, ease of installation, and convenience, Wireless LANs are widely used in homes, offices, schools, colleges, airports, hotels, shopping malls, and other public places.
Most Wireless LANs operate using the IEEE 802.11 family of wireless networking standards. These standards define how wireless devices communicate with each other and ensure compatibility between products from different manufacturers. Modern wireless devices generally support both the 2.4 GHz and 5 GHz frequency bands. The 2.4 GHz band provides wider coverage but is more likely to experience interference from other electronic devices, while the 5 GHz band offers higher data transfer speeds with less interference but has a shorter coverage range.
Most current wireless devices follow the IEEE 802.11n or IEEE 802.11ac standards, which provide faster speeds, better performance, and improved network reliability. Older wireless devices may operate only on the 2.4 GHz band using the IEEE 802.11b or IEEE 802.11g standards, or on the 5 GHz band using the IEEE 802.11a standard. The latest wireless devices also support the 6 GHz frequency band through Wi-Fi 6E, which offers greater bandwidth, reduced network congestion, lower latency, and faster wireless communication.
Wi-Fi is the commercial certification and marketing name for wireless networking technologies based on the IEEE 802.11 standards. The Wi-Fi Alliance is responsible for testing wireless devices and certifying them to ensure they meet the required standards and can work together without compatibility issues.
Today, Wireless LAN technology is built into almost all modern electronic devices, including smartphones, laptops, desktop computers, tablets, smart TVs, printers, gaming consoles, and Internet of Things (IoT) devices. Many public locations such as airports, railway stations, hotels, restaurants, libraries, and educational institutions provide Internet access through Wi-Fi hotspots, allowing users to connect to the Internet using their wireless devices without requiring a wired connection.