Frustration takes place when your expectations are not met. If you haven’t clearly communicated what you are looking for, you probably won’t receive it.
Lack of Understanding:
When communication isn’t clear, it is not understood. Understanding is the point of information transfer.
Is what you are saying getting through? For the answer to be yes, the person must have understood you.
Understanding happens when the person you are communicating to is able to make use of your information.
I have misunderstood driving directions before and this has caused me to get to the wrong place, but more on this in the next point.
When communication breakdown, the relationships of the people trying to communicate also breaks down. A misunderstanding can be taken as an attack or something done on purpose or out of deceit.
Generally this isn’t true, but miscommunication fuels these types of relationship break downs.