Domain name query method and domain name query device

Abstract

The embodiments of the invention disclose a domain name query method and a domain name query device. The domain name query method comprises the following steps: when receiving a first domain name resolution request, acquiring the predicted round-trip delay of each domain name server in M domain name servers; determining the first domain name server in the M domain name servers, wherein the predicted round-trip delay of the first domain name server is the minimum; determining the second domain name server in the M domain name servers, wherein the difference between the predicted round-trip delay of the second domain name server and the predicted round-trip delay of the first domain name server is less than a preset threshold; and sending a domain name query request to the first domain name server or the second domain name server at default probability, wherein the probability that the domain name query request is sent to the first domain name server is the maximum. The embodiments of the invention not only can adapt to dynamic network change, but also can ensure that the network delay of the domain name query request is relatively small.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a domain name query method and device. Background technique [0002] When the client needs to access the network, the URL entered in the browser needs to be resolved through the recursive domain name system (Domain Name System, referred to as DNS) to find the corresponding IP address before going online. The recursive DNS is mainly used to complete the mapping from domain names to Internet Protocol (IP) addresses and resolve other Internet resources. The mapping from the domain name to the IP address is usually stored in static databases of multiple authorized domain name servers (Name server, NS). [0003] When recursive DNS resolves a specific domain name, there are usually multiple authorized domain name servers to choose from. Faced with multiple domain name servers, recursive DNS faces the problem of choosing a domain name server. The ideal result is of course to alw...

AI Technical Summary

Problems solved by technology

[0003] When recursive DNS resolves a specific domain name, there are generally multiple authorized domain name servers to choose from. Faced with multiple domain name servers, recursive DNS faces the choice of domain name For server problems, the ideal result is of course to always choose a domain name server that returns the resolution result the fastest. However, due to changes in network quality and status of the domain name server, who can return the resolution result the fastest is a dynamic change.

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