No matter what kind of wire, the need for the user and the server's IP address to be resolved in order to select the line, IP address resolution technology, equipment and a sound and a large address database is very important - the principle of user visits a site the first DNS server to query the site's IP address, DNS server will judge whether the user is Telecom Internet network or the Internet? Telecom Internet return the IP address of the telecommunications; Netcom Internet to return the network IP address; so intelligent judgment, intelligent identification purposes. This analytical technique has a certain threshold, so each operator can be achieved only by adopting a two-lane host of intelligent DNS resolution before it can be said is true wire service.

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