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A Domain Name Server (DNS) translates domain names, such as, to the IP addresses where the systems actually run. Browsers use these directories to load internet resources. The internet uses openly accessible DNS servers, but companies also often create their own DNS servers for internal resources, and the information stored in them can be very useful for hackers. For example, a hacker who has gained access to an internal network could use a DNS server to discover the subnet(s) where servers are located in order to attempt server attacks on them or in order to discover what types of devices are running on the subnet where they have gained access.

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