Wi-Fi learning path and core concepts

Wi-Fi definition and purpose

Wi‑Fi is a family of wireless networking protocols based on the IEEE 802.11 standards. It enables nearby digital devices to exchange data by radio waves for local area networking and Internet access. Wi‑Fi is widely used in homes, small offices, and public places (e.g., coffee shops, hotels, libraries, and airports) through wireless routers and wireless access points. The purpose of Wi‑Fi is to connect devices within a local coverage area (a hotspot) and allow them to communicate with each other and, when an access point is connected to the Internet, to access the Internet. Wi‑Fi operates using specific radio frequency bands (commonly 2.4 GHz and 5 GHz, with newer generations also using 6 GHz), divided into channels; within range, only one transmitter can use a given channel at a time. Wi‑Fi products may be labeled “Wi‑Fi Certified” by the Wi‑Fi Alliance, which restricts the branding to devices that pass interoperability certification testing; non-certified devices are typically referred to as WLAN and may or may not work seamlessly with certified equipment.

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IEEE 802.11 relationship and Ethernet compatibility

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