| 摘要 |
The domain resolution server includes measurement means for measuring communication states between sites, path setting means for setting a path for delivering content based on the measurement result, and assignment means for assigning a proxy server corresponding to a domain. The path setting means sets, on the path, a domain resolution server of an adjacent parent site located upstream of the own site as a parent domain resolution server. The assignment means requests the parent domain resolution server for domain resolution based on an identifier, and in accordance with a response, notifies a proxy server of the own site of a proxy server in the parent site to which a content request should be transferred, assigns a proxy server to be required from among the proxy servers in the own site in response to a request from a client or a domain resolution server of a child site, and notifies.
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