title: classless IP Subnetting
body: <p>i want to do subnetting with the given ip address as follows<br>
  192.168.10.0/25<br>
  My requirement is i want 30 addresses per subnet.<br>
  what will be the nw address of subnet 0?<br>
  is it 192.168.10.0/27 or 192.168.10.128/27 ? <br></p>