16. The method of claim 12 , wherein if the directory path matches an ISP client directory path in the list of ISP client directory paths, the method further comprises determining if the directory path is one directory level below the matched ISP client directory path.
16. The method of claim 12 , wherein if the directory path matches an ISP client directory path in the list of ISP client directory paths, the method further comprises determining if the directory path is one directory level below the matched ISP client directory path. 17. The method of claim 16 , wherein determining whether the URL is a root URL or a leaf URL comprises determining that the URL is a root URL if the directory path is determined to be one directory level below the matched ISP client directory path.