The Domain Name System (DNS) is a service internet directory, which relates to the way domain names are decoded into the Internet Protocol’s addresses. At such, the DNS is the determining factor of whether an internet user can use the browser to access websites or not. DNS also controls email sending and receiving. DNS is made up of three components namely: The DNS data, DNS servers and DNS internet protocols. DNS data holds multiple resource records which are stored as zones. Zones are basically file types stored on servers and networked to the World Wide Web. Zones are responsible for responding to queries and get the information from the DNS resource records.
For DNS to work, website programmers use the DNS server component and the DNS client component. These two are components that run in the background and help in service application. Since Network resources are only identifiable through the numeric internet protocol addresses, network users may have problems remembering all the number work. The records contained in the DNS database however make remembering the network resources easy. This is done by easing the communication of the internet protocol address and the network resource by charting comprehensible alphanumeric names. Instead of a user having to remember the IP address 202.111.166.24, for example, he/she is just required to remember www.XYZ-Example.com.
In a layman’s language, DNS can aptly be described as the internet’s directory. At such, if one knows the exact site that he/she is looking for, then it becomes pretty easy to locate the site because the server is able to look up the name in the Internet protocol’s addresses.
The Domain names and corresponding IP addresses are dispensed through out the internet in hierarchy based on authority. This authority depends on geographical proximity and the frequency of use. The hierarchy, which is known as domain namespace defines the mechanism through which the server queries and updates the database, replicates information and schemes the database. The domain names have distinct labels, with dots separating them like myname.companyname.com
The DNS technology decreases the data load on a server because the host names are distributed to multiple server. The naming of alphanumeric naming is administered based on partition basis. The DNS is also responsible for the translation of a Fully Qualified Domain Name (FQDN) to a unique computer address. This is done by giving the computer four distinct numeric segments. The DNS assigns a permanent number to each computer in ones network.