"This is what I understand" or "This is how I understand it", etc
Which one of the following statements is correct or do all of them make sense?
System A works independently and does not affect System B. This is what I understand.
System A works independently and does not affect System B. This is how I understand it.
System A works independently and does not affect System B. This is my understanding.
All three are correct and make sense, but it would probably be better to say
My understanding is that System A works independently and does not affect System B.