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Otherwise, the query is shipped again utilizing the Transmission Control Protocol (TCP). Some DNS resolver implementations use TCP for all queries. You should use a network tool corresponding to dig or drill to lookup a website title, the tool will reply with an authoritative flag that reveals whether or not the DNS server you might have queried is the authoritative one. The primary component, the highest-Level Domain (TLD), is queried using a root server to acquire the responsible authoritative server. TIP: One in every of the main causes to use Unbound over several other easy caching-only resolvers, reminiscent of dnsmasq for instance, is that if you don't use the ahead option in Unbounds configuration, Unbound will question the foundation servers instantly utilizing their registered IP addresses listed in the basis Hints File. A easy caching server resembling dnsmasq will at all times forward queries to another server, whereas Unbound queries the foundation servers immediately and works its way down the domain chain till it gets the relevant document from the registered authoritative DNS server for the relevant area. This will free you of your ISP DNS servers and any public DNS servers, corresponding to Google or Cloudflare, and no matter data recording, selling and manipulation they're doing is prevented.