Answer:
true
Explanation:it is true because like that they could send that letter were it go's so like that they don't have trouble looking for the person's letter
please mark me as brainlist
It allows for more accurate sizing of networks.
Answer:
A logical unit of a system.
Explanation:
i'm thinking your are talking about system layers such as the ISO? Layers help identify the order of how the whole system works.
Answer:
The first one I'm sorry if I'm wrong
I think so that it will be zero or more