Question

How can a device address bus devices located in a different area?

KNX BasicLearnKNX TopologyMedium
Answer

A — Via the backbone line, which interconnects the areas.

Correct: An area-crossing telegram uses the backbone line to move between areas.

Source

KNX Basic Course Documentation — 3.13 — p. 77

All proposed choices (exam context)
  1. A.Via the backbone line, which interconnects the areas.
  2. B.Via the main line only, without the backbone line.
  3. C.Directly, because all areas share one common line.
  4. D.It cannot; devices in different areas can never communicate.
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Last updated: 19 May 2026

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