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The main DNS severs (root servers) are owned and managed by a variety of different organizations, and are located mainly in the USA. The DNS system consists of many Domain Name servers that together provide the name to IP address mapping for registered devices (usually servers) on the Internet. See Understanding The Domain Name Structure DNS System This takes the form of a tree like structure that resembles the file system structure found on computers.

The solution is to place the machines into administrative areas known as domains, and arrange the domains in a hierarchy. The hosts file is simply a list of names and IP addresses with no structure making it difficult to scale to a large number of machines. Protocols ,services and methods for storing,updating, and retrieving IP addresses for hosts computers.- DNS Systemįrom the perspective of an end user you can consider the DNS system as a structured hosts file.

A way to organize the names- Domain name structure.

To overcome these (and other) limitations the DNS system was developed.

Updates were difficult to manage as all of the computers would need to be given an updated file.

The text file could take a along time to process due to the fact that it was unstructured.

It needed to be stored on each computer.

The location for the hosts file is normally C\windows\system32\drivers\etcĪs network sizes increased the hosts file approach became impractical due to the fact that: This enabled people to refer to other computers by the name, and their computer translated that name to an IP address when it needed to communicate with it. On early computer networks a simple text file called a hosts file was created that mapped host names to IP addresses. To make it easy for people to remember names ( host names) are used to identify individual computers on a network. IP addresses are easy for computers to process but they are not so easy for people to remember. DNS Basics – Understanding Why we Need itĪll devices (computers etc) that are connected to the Internet, your own network, or company network are identified by an IP address which is a number. In this tutorial we will cover the basics of DNS starting with why it was developed, what problems it was designed to solve.

DNS (Domain Name System) is one of the most important technologies/services on the internet, as without it the Internet would be very difficult to use.ĭNS provides a name to number (IP address) mapping or translation, allowing internet users to use, easy to remember names, and not numbers to access resources on a network and the Internet.