A 10-story building needs to cover WLAN signals, because considering the floor blocking, the signal frequency of WLAN on the 5th and 6th floors can be set to 6 channels at the same time.

Question

Options

• ATrue
• BFalse

• A
  21% (13)
• B
  79% (48)

Explanation

Option B (False) is correct because the 5th and 6th floors are directly adjacent, meaning floor attenuation between them is insufficient to prevent co-channel interference - the same channels cannot be reused simultaneously on neighboring floors without causing signal degradation. Floor blocking only meaningfully enables channel reuse when floors are separated by at least one or two floors, not when they are immediately adjacent. Additionally, in the 2.4 GHz band, only 3 non-overlapping channels exist (1, 6, and 11), so the premise of "6 channels simultaneously" is already physically impossible in that band regardless of floor separation. Option A is wrong because it incorrectly assumes floor blocking is strong enough between adjacent floors to justify channel reuse.

Memory tip: Think "neighbors interfere" - just as wall separation between rooms isn't enough to reuse the same frequency, the single floor between levels 5 and 6 isn't enough either. Channel reuse requires meaningful physical distance, not just a ceiling between you.

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