How to check that communication has been understood by all involved

Maybe ask?

I mean, I'm only guessing because I can't do too much more what with the lack of detail and information you provided.

It's a homework question that gets' asked frequently here. You can see it in Related Questions,

It's a homework question that gets' asked frequently here. You can see it in Related Questions,


Psst... I know that... I was just having some fun. ;)

D'oh!

Well played. Hehe.