Question
Why are the maxima of 65536 group objects and 65535 group addresses described as essentially theoretical?
Answer
C — Because they are normally not reached by current applications
Correct: The text calls them a pure theoretical value, normally not reached by current applications, comparable to the total address capacity of a KNX system.
Source
KNX Basic Course Documentation — 3.2.4 — p. 129
All proposed choices (exam context)
- A.Because no KNX device can physically store more than 254 objects
- B.Because the ETS caps every project at 254 group objects
- C.Because they are normally not reached by current applications✓
- D.Because the values apply only to System 1 devices
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