Question
In which situation does the high bit rate of the Ethernet backbone NOT prevent problems?
Answer
D — When telegrams are sent out simultaneously from all lines into one single line.
Correct: the source says Ethernet's higher speed will not help when all lines send telegrams simultaneously into one single line.
Source
KNX Basic Course Documentation — 20 — p. 86
All proposed choices (exam context)
- A.When the routing counter of a telegram reaches zero.
- B.Whenever a line has fewer than 240 devices.
- C.Only when RF segments are present in the installation.
- D.When telegrams are sent out simultaneously from all lines into one single line.✓
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