Patent Document ID: 7596619
Application ID: 11934894

Base Claim:
1. A content delivery network (CDN) for use by participating content providers, comprising: a domain name service managed by a CDN service provider (CDNSP) and authoritative only for given content domains associated with the participating content providers; and a set of content servers operated by the CDNSP; wherein, following an end-user request for a web page that is directed to a participating content provider domain, the domain name service uses a CDNSP-specific domain to identify an IP address associated with a CDN content server of the set of content servers operated by the CDNSP; wherein the CDN content server includes code (i) that determines whether a default markup language file associated with the web page exists on the CDN content server, (b) that is responsive to a determination that the default markup language file exists on the CDN content server for serving the default markup language file in response to the end-user request for the web page, (c) that is responsive to a determination that the default markup language file does not exist on the CDN content server for directing a request for the default markup language file to a second server, for receiving from the second server the default markup language file, for serving the default markup language file in response to the end-user request for the web page, and for caching the default markup language file for a given time and (d) that logs data associated with the default markup language file served from the CDN content server.

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Claim 4:
4. The content delivery network as described in claim 1 wherein the determination that the default markup language file exists on the CDN content server examines whether the default markup language file is stored in association with the CDN content server and, if so, whether a timestamp associated with the default markup language file is expired.