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United States Patent 8,341,297
Swildens ,   et al. December 25, 2012
Latencies and weightings in a domain name service (DNS) system

A method for determining metrics of a content delivery and global traffic management network provides service metric probes that determine the service availability and metric measurements of types of services provided by a content delivery machine. Latency probes are also provided for determining the latency of various servers within a network. The latency probe calculates, for example, the latency from its location to a client's location using the round trip time for sending a packet to the client to obtain the latency value for that client. DNS servers use the latency test results, along with traffic weightings, to determine a server to return for a given DNS name.

Inventors: Swildens; Eric Sven-Johan (Mountain View, CA), Day; Richard David (Upton, MA), Gupta; Ajit K. (Fremont, CA)
Assignee: Akamai Technologies, Inc. (Cambridge, MA)
Appl. No.: 13/419,723
Filed: March 14, 2012
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