A recreation-center AP was set to 40 MHz channel width on a crowded 2.4 GHz band, and nearby municipal devices all slow down. What configuration mistake best explains the impact?
Select an answer to reveal the explanation.
Short Explanation
Forty megahertz on busy 2.4 GHz is like parking a wide truck across two narrow lanes—everyone scrapes paint. Stick to the narrower width the design calls for in that crowded band. Performance comes back when you stop hogging spectrum.
Full Explanation
Using 40 MHz channels on congested 2.4 GHz consumes scarce spectrum and increases overlap with neighboring networks, degrading performance broadly. Appropriate technician action is to restore the design channel width, typically narrower on 2.4 GHz in dense environments. This configuration error is a Domain 5.2 performance issue. It is not solved by changing unrelated security or PoE settings.