Question

Why does each KNX RF line or segment receive its own unique domain address?

KNX BasicLearnKNX RF (Radio)Medium
Answer

C — To avoid logical interference between adjacent KNX RF lines.

Correct: the domain address gives each RF line a unique identity to prevent logical interference.

All proposed choices (exam context)
  1. A.To increase the physical radio range of the line.
  2. B.To set the 868 MHz carrier frequency for that line.
  3. C.To avoid logical interference between adjacent KNX RF lines.✓
  4. D.To supply bus power to the RF devices.
Full bank

Keep going with the full KNX Basic bank

Keep going with the full KNX Basic bank: unlimited timed mock exams, detailed answers, history. From €9 (one-time payment).

See pricing — from €9 →
Want more?

Continue KNX Basic practice

Related questions

Question from our independent practice bank. KNX Basic is a registered trademark of KNX Association, not affiliated with CertifBus.

KNX Basic v2 bank · September 2026

See pricing — from €9
KNX Basic pack · from €9
KNX BASIC

Your next study session starts with 10 questions.

Try the questions and explanations without an account. Then choose an access period that fits your preparation.

+1 / −0.5 / 0 official scoringFR·EN·DE interface and explanations€9 from · one-time payment
Newsletter

Keep your KNX preparation moving

We’ll email you when new KNX questions, a guide or a tool is published. No spam.

Unsubscribe in 1 click. No sharing with third parties.