How to solve this problem

Given - 16.20.0.0 / 16
Requirement - I need 1000 host address / 500 n/w address / 4096 n/w address ( 16.0.0.0 / 8 )
1) What is 1st valid host address
2) What is 2nd last Broadcast address.
I know its too nooby i forgot the calculation to this problem.

Nothing like learning;

Take a look at these resources and give it a go, i'm sure if you post your answers someone will validate them for you and point out any mistakes.

www.firewall.cx/ftopict-2823.html
www.firewall.cx/ftopict-2145.html
www.firewall.cx/ip-subnetting-intro.php

16.0.0.0/8 is a regular class A address, so you have 16,777, 314 hosts. First host is 16.0.0.1, boradcast is 16.255.255.255, last host is 16.255.255.254.

For 1000 hosts you need a /22 as a minimum (1022 hosts) which gives you just 64 networks. But before I go on, just how many network addresses do you need? Is it 500 or 4096?

Requirement - I need 1000 host address / 500 n/w address / 4096 n/w address ( 16.0.0.0 / 8 )

I can give you either, I think!!!