What is cross domain request / cross domain attacks / cross domain protocols [closed]

Question

Can some body explain what is cross domain request / cross domain attacks / cross domain protocols with respect the ajax terminology.

Answer 1

Cross domain request: Requesting content from another host, than where the website is hosted. For example site hosted at google loads a facebook icon from facebook domain.

Cross domain attack: I think there are whole books about these, but basically: The domain making the request cannot verify the content retrieved from another host, so it can be modified. Other usual is sending a login form or some other form from another domain instead of the actual login page. Badly designed interface could let you log in or retrieve sensitive data.

I'm not sure about Ajax protocols.