purpose of broadcast and network id ?

0 appréciations

I have been given an ip address where i need to do sub-netting. ex:
x.x.x.x /28. after doing the sub-netting i would end up with the 'Network ID', range of IP that can be used and the 'Broadcast ID'.
So, the range of ip's i know that is for the hosts..printers, computers ..etc. where do i use the broadcast and network id? What is for exactly? 

can someone help me please.

I did not find the right solution from the internet.

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