Which of the following statements about WLAN roaming are true?

Question

Options

• AAPs for roaming do not need to have overlapping signal coverage.
• BAPs for roaming must be in the same service set (ESS).
• CAPs for roaming must have overlapping signal coverage.
• DAPs for roaming must be in the same basic service set (BSS).

• A
  82% (28)
• B
  6% (2)
• C
  9% (3)
• D
  3% (1)

Explanation

There appears to be an error in the provided correct answer. Based on standard WLAN networking principles, B and C are both true - not A.

Why B and C are correct:

• C (overlapping coverage): APs must have overlapping signal coverage so a client can detect and associate with the next AP before losing connection to the current one. Without overlap, there is a coverage gap and the roam is not seamless.
• B (same ESS): APs must be part of the same Extended Service Set - they share the same SSID. This is what allows a client to move between APs transparently without re-authenticating manually.

Why A is wrong: Stating that overlapping coverage is not needed contradicts how seamless roaming works. A client must hear the next AP while still connected to the current one to transition smoothly.

Why D is wrong: A Basic Service Set (BSS) is a single AP and its associated clients. Roaming by definition moves between multiple APs, which forms an ESS - not a BSS. Saying roaming requires the same BSS is a contradiction in terms.

Memory tip: Think of ESS as the "Extended highway" - multiple APs (on-ramps) with the same name (SSID) and overlapping coverage zones so you never leave the road while switching lanes.

Recommendation: Double-check your source material. The answer key likely contains a typo - B and C are the conventional correct pair for WLAN roaming questions.

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