Question
When a tool wants to read or write the memory of a System 2, 7 or B device, how must it authorize itself?
Answer
B — With an authorization key of 4 bytes
Correct: Access requires the tool to first authorize itself with a 4-byte authorization key.
Source
KNX Basic Course Documentation — 3.2.1 — p. 128
All proposed choices (exam context)
- A.With an authorization key of 2 bytes
- B.With an authorization key of 4 bytes✓
- C.With an authorization key of 6 bytes
- D.No authorization is needed for System 2, 7 or B devices
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