Glossary · Networking

Wi-Fi

Wi-Fi is a family of wireless networking standards, based on IEEE 802.11, that lets devices join a local network over radio instead of cables.

Updated October 6, 2026

Wi-Fi is the brand name for wireless local area networking based on the IEEE 802.11 standards. Devices connect over radio to an access point, which bridges them to the wired network.

Why it matters

Wi-Fi runs mainly in the 2.4 GHz, 5 GHz and 6 GHz bands. Lower bands travel farther and pass through walls better; higher bands carry more data over shorter range. All devices on a channel share airtime, so throughput drops with distance, interference and the number of active clients. Marketing speeds are theoretical maximums.

Example

NameStandardBands
Wi-Fi 4802.11n2.4, 5 GHz
Wi-Fi 5802.11ac5 GHz
Wi-Fi 6802.11ax2.4, 5 GHz
Wi-Fi 6E802.11axadds 6 GHz

Common mistakes

  • Using outdated WEP or WPA instead of WPA2 or WPA3.
  • Placing the access point in a corner or cupboard and then blaming the provider.
  • Choosing a crowded channel on 2.4 GHz instead of a clearer one.

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Keep reading

Glossary · Networking802.1X (Port-Based Network Access Control)802.1X is an IEEE standard that blocks a network port until the connecting device authenticates, commonly with a RADIUS server.Glossary · NetworkingAccess Point (Wireless AP)A wireless access point is a device that connects Wi-Fi clients to a wired network, acting as the bridge between radio and Ethernet.Glossary · NetworkingAnycast RoutingAnycast announces the same IP address from many locations, so network routing sends each user to a nearby site and absorbs traffic floods.

This page is general information written by our editorial team and updated when documentation changes. Servers and providers differ, so test changes safely first. See our editorial policy and disclaimer.