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About the Domain Name System

Originally, computers performed name-to-address mapping via a simple text file, the hosts file, which contained a list of every machine that needed to be referenced by name. Using the hosts file, a computer could resolve a lookup. Every computer had a copy of the hosts file. If an IP address changed for any machine in that file, the reference would need to be changed in the hosts file and every computer’s hosts file would need to be updated to reflect the change. Clearly, the number of machines on the Internet today makes this an impossible task. The Domain Name System ... Read More »