Reference / Wi-Fi
IEEE 802.11: the standard family behind Wi-Fi
IEEE 802.11 is a family of wireless LAN specifications. It defines media-access and physical-layer behaviour so stations can share local radio spectrum. Implementations of that family still need configuration and compatibility checks in the intended network.
MAC and PHY solve different problems
The PHY describes radio transmission and reception. The MAC coordinates access to the shared medium and carries frames. A fault can therefore be radio-related, such as interference, or configuration-related, such as contention or authentication mismatch.
Standards revisions are not a shopping list. Compatible modes matter, but the result also depends on channel planning, wired uplink, client drivers and active-station count.
Use an engineering vocabulary
For a survey, record band, channel, width, signal measurements and competing networks. For a change, record security method, client impact and rollback procedure. This makes observations comparable.
Radio use is jurisdictional. Rules can distinguish band, power, indoor or outdoor use and equipment authorization. Treat standards as technical context and obtain applicable local requirements before deployment.
Plan coexistence
A wireless LAN shares spectrum with nearby systems. Avoid treating a stronger signal as the only cure: poor channel choices can make neighbouring networks worse.
Use site observations to choose settings, then revisit them after occupancy or layout changes. Coexistence is an ongoing operating task, not a one-time checkbox.