Domain Name System

An addressing method used by the Internet that allows words a human can recognize, like “tringa.com”, to represent a unique network address that only a machine can love, like “198.87.128.43”. These numerical addresses, fitting into a pattern ranging from 0.0.0.0 to 255.255.255.255, are referred to as “Internet Protocol (IP)” addresses. Like any computer network system, each computer or other resource on the network must have an exact and unique address. When the network is worldwide, like the Internet, and connects millions of computers, some system must be enforced to maintain these unique addresses. The organization fulfilling this responsibility is Network Solutions, Inc. (NSI), previously the Internet Network Information Center (InterNIC). Whenever someone wishes to add a resource to the Internet, such as adding a site (home page) to the World Wide Web (WWW), they must obtain a unique address from NSI. Traditionally this has been done by applying for a domain name, like tringa.com, which is then linked to a unique numerical (IP) address. Both the domain name and the IP address must be unique, and are assigned by NSI on a “first come, first served” basis. This address is also referred to as the resource’s “Uniform Resource Locator (URL)”, particularly when the address contains the domain name plus the name and location of the file referred to, and the protocol to be used to download (or read, or browse) the file.


 


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