Definition: DNS is an acronym that stands for Domain Name Service. The Domain Name Service is one of the main components or protocols associated with the Internet. The Domain Name System interprets or translates the more human readable names such as www.mybusiness.com into numerical IP (Internet Protocol) addresses such as 192.23.23.01 which makes it possible for computer users on the Internet or private networks to connect to other users or networks. The Domain Name System facilitates the logical operations of the global Internet. The main function of Domain Name Service (the naming and location of computers on the Internet) can be exploited by crackers.
Its Relevance: The Domain Name System can be fooled or "spoofed" unless precautions are taken. These methods (such as tightening authentication mechanisms) should be mandated by the organization’s security policies.