title: Converting CIDR address to subnet mask and network address
body: <p>Given a CIDR address, e.g. <code>192.168.10.0/24</code></p>
  
  <ul>
  <li>How to determine mask length? (<code>24</code>)</li>
  <li>How to determine mask address? (<code>255.255.255.0</code>)</li>
  <li>How to determine network address? (<code>192.168.10.0</code>)</li>
  </ul>