Trusted Sites Zone (Whitelisting)

Keep in mind that when the Internet
Zone is set to High, you may encounter web sites that do not
function properly due to one or more of the associated security settings. This
is where the Trusted sites zone can help. If you trust that
the site will not contain malicious content, you can add it to the list of
sites in the Trusted sites zone. Once a site is added to this zone, features
such as ActiveX and Active scripting will be enabled for the site. The benefit
of this type of configuration is that IE will be more secure by default, and
sites can be “whitelisted” in the Trusted sites zone to gain extra
functionality.