Question

Before segment couplers, what was the maximum number of small TP islands that could be connected via an IP backbone (the 'hotel scenario')?

KNX BasicLearnKNX TopologyMedium
Answer

A — 240

Correct: the source gives a maximum of 240 TP islands (225 + 15).

Source

KNX Basic Course Documentation — 21.1 — p. 87

All proposed choices (exam context)
  1. A.240
  2. B.225
  3. C.256
  4. D.255
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Last updated: 19 May 2026

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