Cache policies are:
Bypass Cache: Do not cache this request or its response in the CDN.
Basic Caching: Caches a URL naively.
Ignore Query String: Will cache a URL as if the query string was not there. This means that URLs like: domain.com/mypic.jpg?a=1, domain.com/mypic.jpg?a=2, domain.com/mypic.jpg?b=1 will all be considered equivalent for caching and will return the same response once any have been cached.
Standard / Aggressive: Will cache URLs with http://yourdomain.com/pic.jpg?with=query
Cache Everything: This will cause the CDN to cache this URL, as is. Subsequent requests will be served the same response.