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IP ADDRESS TABLE STORAGE AND QUERY METHOD APPLICABLE IN DNS QUERYING

Abstract(summary):

The present invention relates to an IP address table storage and query method applicable in DNS querying. The method comprises: performing deduplication on IP tables of respective policies, and storing the same in a red-black tree, an array, a linked list, or the like; merging the IP address tables of the different policies of each service so as to construct an "IP address table + policy" format, and storing information in the format, wherein the merging is performed by following an IP longest-prefix match rule or a priority level rule; continuing to merge the "IP address table + policy" storage structures of the different services so as to construct an "IP address table + service + policy" format, and storing information in the format; sorting the "IP address table + service + policy" storage structures, such that initial addresses of IP address tables are arranged by numerical order; and performing a DNS query by employing a query method, such as the bisection method. The present invention improves the existing IP storage structures, facilitates easy operation, reduces the number of queries, and increases the query efficiency.


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