Limelight Networks, Inc.

Brad B Harvell

Michael M Gordon

Nils H McCarthy

Nathan F Raciborski

Gary S Baldus

Lee A Stafford

A domain name service (DNS) resolver returns Internet protocol (IP) addresses. A connection with an Internet application or device receives domain name resolution requests that originate outside of the Internet. A direct DNS resolver identifies IP addresses without referring to the Internet or using other DNS resolvers. An address store includes a predetermined list of domain names and corresponding IP addresses specified from a point remote to the DNS resolver. The DNS resolver processes the domain name resolutions for the predetermined list of domain names differently than domain name resolutions for other domain names not on the predetermined list of domain names. At least part of the predetermined list is pushed to a destination upon receiving a resolution request for a domain name in the predetermined list of domain names, the request being of a type other than an authoritative resolution request to be performed by the direct DNS resolver.

Domain name service resolver

A content delivery network (CDN) for delivering content over the Internet is disclosed in one embodiment. The CDN includes a domain resolution service (DNS) server, caching servers and an Internet interface. The caching servers correspond to a plurality of addresses. The DNS server receives two domain resolution requests corresponding to a same domain and produces two different DNS solutions, each corresponding to a subset of caching servers. The interface receives domain resolution requests, including the two domain resolution requests, and transmits DNS solutions, including the two DNS solutions. The processing power is generally matched between the two DNS solutions.

Domain name resolution resource allocation

A domain name service (DNS) resolver for returning Internet protocol (IP) addresses is provided in some embodiments of the invention. The DNS resolver includes a connection with an Internet application or device, wherein the connection receives domain name resolution requests that originates outside of the Internet. The DNS resolver also includes a direct DNS resolver that processes domain name resolutions without referring to the Internet after receiving a domain name resolution request and a recursing DNS resolver, wherein IP addresses are found by querying one or more DNS servers on the Internet after receiving domain name resolution requests. The DNS resolver includes an address store having a predetermined list of domain names and corresponding IP addresses that are specified from a point remote to the DNS resolver. The DNS resolver process the domain name resolutions for the predetermined list of domain names differently than other domain name resolutions.

A content delivery network (CDN) for delivering content over the Internet is disclosed in one embodiment. The CDN is configured to deliver content for others and includes a domain resolution service (DNS) server, caching servers and an Internet interface. The DNS server receives a first domain resolution request and produces a first DNS solution, and receives a second domain resolution request and produces a second DNS solution. The first and second domain resolution requests correspond to a same domain. The caching servers correspond to a plurality of addresses. The interface receives domain resolution requests, which include the first and second domain resolution requests, and transmits DNS solutions, which include the first and second DNS solutions. The first DNS solution comprises a first plurality of addresses corresponding to at least a first subset of the plurality of caching servers, and the second DNS solution comprises a second plurality of addresses corresponding to at least a second subset of the plurality of caching servers. The first DNS solution is different from the second DNS solution in that the second subset includes an address for a caching server not in the first subset. The second subset is chosen to generally match a processing power of the first subset.

A content delivery network (CDN) for providing content objects and domain resolution. The CDN includes a connection with a terminal device, a second domain name service (DNS) system, an IP address store for holding authoritative Internet protocol (IP) addresses, and a content store holding at least one of the first or second content object. A first request to resolve a first domain name is received by the second DNS system at a second location. A second request to resolve a second domain name is received by the second DNS system at the second location. The first domain name is associated with a first content object, and the second domain name is associated with a second content object. The first and second requests are relayed with the terminal device, which receives Internet access from an access network. The access network comprises a first DNS system that functions in a recursing DNS mode. The content object is realized in a first location that is different from the second location of the terminal device. The second DNS system operates in a recursing DNS mode to retrieve a first IP address corresponding to the first domain name. The first IP address for the first domain name is returned from the second DNS system to the terminal device to fulfill the first request. The second DNS system operates in an authoritative DNS mode to retrieve a second IP address from the IP address store. The second IP address for the second domain name is returned from the second DNS system to the terminal device to fulfill the second request.

Embodiments include a domain name service (DNS) resolver for returning Internet protocol (IP) addresses. The DNS resolver includes a connection with an Internet application or device. The connection receives a domain name resolution request that originates outside of the Internet. A DNS resolver includes a direct DNS resolver that processes domain name resolutions for a predetermined list of domain names without referring to the Internet after receiving a domain name resolution request. The DNS resolver also includes a cache of domain names different from the predetermined list of domain names. The DNS resolver also includes an address store comprising the predetermined list of domain names and corresponding IP addresses that are specified from a point remote to the DNS resolver.

Method and systems to resolve IP addresses in response to domain name resolution requests on a packet-switched network. A request to resolve the domain name is received at a CDN in a second location. The domain name is associated with a content object and is relayed with a terminal device, which receives Internet access from an access network. The access network comprises a first DNS system that functions in an authoritative DNS mode. The content object is realized in a first location of the terminal device, different from the second location. An IP address for the domain name is returned from the second DNS system, wherein the second DNS system alternatively operates in both the authoritative and a recursing DNS mode. The content object is delivered from the second location with the CDN toward the terminal device.

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Chandler, AZ, United States of America

Brad B Harvell