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<p>by designating <a href="page.php?w=authoritative_name_server">authoritative name server</a>s for each domain. Network administrators may delegate authority over <a href="page.php?w=subdomain">subdomain</a>s of their allocated name space to other name servers. This mechanism provides distributed and <a href="page.php?w=fault-tolerant">fault-tolerant</a> service and was designed to avoid a single large central database. In addition, the DNS specifies the technical functionality of the <a href="page.php?w=Database_model">database</a> service that</p><p>
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