Google Network & Parking Programs Question?

[sneezycheese]

Up to now whenever I've setup a Google AdWords Account for a client I have presumed that parking programs such as Sedo, Name Drive, etc. formed part of Google's Content Network. As such, I have always set the Content Network Bid very low so to try and avoid the ads showing on any parked page.

So my question is: Have I got it right? - i.e. Are these programs part of Google's Content Network, or have I got it completely wrong and in fact they form part of Google's Search Network? :???:

Regards,

Sneezy.