|I "For small networks like a home network, you can add some extra protection by turning off the DHCP, or automatic IP addressing, feature of the router and manually assigning static IP addresses. "|
Whoever wrote that was talking rubbish. It will do absolutely nothing at all for security. Not the slightest.
If you must have static addressing at home and DHCP at school then you can set up different profiles. You daughter will then be prompted for which profile to use every time she boots. I dont know how you do that in Windows 7 but in Windows XP it comes under system properties.