Why visit and exit metric shows same number for entry page dimension?

Hi all, 

One aspect of 'exit' and 'visit' metric that i am confused with is why they both are showing same number for 'entry page' dimension? What can be the possible justification behind this?

Also, if I breakdown page name with entry page then the visit and exit metrics show different numbers which are not equal. Which exact concept am i missing on. Can someone help me with this.

Thanks