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DNS servers are grouped into several categories of specialization of servicing domain name system queries.The two principal roles, which may be implemented either uniquely or combined in a given product are: Answer X is Akamai’s recursive DNS resolver (r DNS). Answer X is a modern resolver, supporting DNSSEC, IPv6, and full subscriber aware policy controls.Dnsmasq is a lightweight, easy to configure DNS forwarder, designed to provide DNS (and optionally DHCP and TFTP) services to a small-scale network.It can serve the names of local machines which are not in the global DNS.ANS was designed to meet the needs of top level domain servers, hosters and large enterprises.Vantio is a commercial high-performance recursive caching server from Nominum, intended as a fast, secure alternative to BIND for service providers, enterprises, and government agencies.In the Windows Server 2016, the DNS Server supports DNS policies using which the admins can have more control over the name resolution process.ANS is a commercial authoritative server from Nominum, a company whose chief scientist and chairman is Paul Mockapetris, the inventor of the DNS.
Excluded from consideration are single-feature DNS tools (such as proxies, filters, and firewalls) and redistributions of servers listed here (many products repackage BIND, for instance, with proprietary user interfaces).The BIND 10 codebase continues on as an open source project at (ibid.) It is not included in this comparison at this time.CNR includes a commercial DNS server from Cisco Systems usually used in conjunction with the CNR DHCP (Dynamic Host Configuration Protocol) server. DNS Blast is highly secure recursive DNS software from Efficient IP.It delivers carrier grade DNS performance for ISPs and enterprises enhancing security with deep analyses transactions at the heart of the DNS recursor.Processing 17 million queries per second, it can eliminate dozens of DNS clusters and load balancers, dramatically decreasing the total cost of ownership and simplifying the DNS infrastructure.