An upstairs access point hears the downstairs 2.4 GHz radio strongly, and the two contend. The downstairs radio is on the ceiling of the floor below. What is the propagation fact?
Select an answer to reveal the explanation.
Short Explanation
The floor is not a firewall for 2.4 GHz. Your downstairs radio is loud enough upstairs that the two radios contend. Treat them as neighbors, because that is what they are.
Full Explanation
A floor can weaken a signal and still leave enough of it for the upstairs access point to hear the downstairs radio and defer. That is ordinary 2.4 GHz propagation, not a mystery building. The floor is not isolating this signal. A floor does not always block 2.4 GHz. The upstairs radio is hearing this one, which is the evidence. Two radios contend on the same channel. The fact that one is upstairs does not mean it must be on 5 GHz. The country code does not turn isolation on or off. A 2.4 GHz signal is heard on the floor above strongly enough to contend with the upstairs access point. The floor is not enough isolation. Check one live client after the change and leave the rest of the floor alone until that client matches the result you expected. Read the live counters after you retest. Exam caveat: 5 GHz through the same floor is often weaker, and it can still leak. Measure both bands before you assume only 2.4 GHz needs a channel plan across floors. Operational check: put the upstairs and downstairs 2.4 GHz radios on non-overlapping channels and confirm they no longer show each other as a busy neighbor.