If a wireless client connected to the same SSID wants to roam from one AP to another, what is the range of signal overlap between the two APs?

Question

Options

• A50%
• BDoes not need to overlap
• C100%
• D10%-15%

• A
  9% (2)
• B
  4% (1)
• C
  4% (1)
• D
  83% (19)

Explanation

For seamless roaming between access points on the same SSID, the recommended signal overlap is 10-15%, making D correct. This small overlap gives the wireless client just enough time to detect the neighboring AP and negotiate a handoff before the signal from the current AP degrades below a usable threshold, preventing dropped connections.

Option A (50%) is wrong because excessive overlap causes co-channel interference, degrading performance for all clients in the area rather than improving roaming. Option B is wrong because zero overlap creates a dead zone between APs where the client loses signal entirely before it can associate with the next AP. Option C (100%) is wrong because fully overlapping coverage areas would mean both APs compete for the same space, causing severe interference and defeating the purpose of having separate APs.

Memory tip: Think of 10-15% like a relay race handoff zone - just enough runway for the runner to pass the baton without stopping, but not so long that both runners are running the same stretch and getting in each other's way.

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