Definition
A Wireless Local Area Network, commonly known as a WLAN or Wi-Fi, is a networking technology that allows devices to connect to the internet or a local network without physical cables. It operates by using radio waves to transmit data between devices and a wireless access point, which then bridges the connection to a wired network. Understanding WLANs is crucial for IT professionals as they are fundamental to modern network infrastructure, enabling mobility and flexibility for users. For instance, a common example is the Wi-Fi network in a coffee shop that allows customers to access the internet on their laptops and smartphones. While often used interchangeably, Wi-Fi specifically refers to the set of standards that govern how WLANs operate, ensuring interoperability between different manufacturers' equipment. This concept is frequently tested on certifications like CompTIA Security+, Network+, and CySA+.