Help understandin IP Adressing, Network Masking,Subnet Masking

I am 18 and currently working towards taking my MCP, i know for this exam i do not need to know too much in depth information about it however i am very curious to how it works….

What i was wanting to ask is if anyone could please take out a little time to explain IP adressin,Network Masking and Subnet Masking in the most simplest of terms as possible?

This help would be very much appreciated and Thankyou in advance!