What Is DNS and What Are Its Functions

Domain Name System or DNS as it is commonly referred to has,a multitude of functions. This system controls the domain name’s website along with your e-mail settings. DNS can be quite confusing to people as there are so many different elements that are used to control each and every aspect of your domain name.

NAMESERVER
This element shows your domain name to whatever company controls the DNS settings. This generally,is where your domain name is registered.

ZONE FILE
This is where all of your DNS settings are stored.

A RECORDS
This gives your domain name to a server using and IP address. Each of these domain names has a primary A Record. This A Record, which is called “@” will control how the domain reacts when it is visited directly.

CNAME
Each of the domains has a sub-domain. The CNAME routes the sub-domains to some other server.

MX RECORDS
This gives your domain names e-mail to its e-mail provider.
The domain name system has the responsibility to assign domain names and to map the names to the Internet resources. It does this by giving authoritative name servers to each of the domains. This system was designed in order to avoid having one single large database. DNS has been in use since the 1980’s

The DNS however, was not intended to be used for a general purpose database. It can store other types of data that are used for automatic lookup for queries by people. This general database has also been used to stop unsolicited e-mail or spam. In order to do this, they have created a real time “black hole” list. Usually, this database is stored in the zone files.

The technical function of the database server is found at the core and defines the domain name’s systems protocol.
The domain names system component is essential for the internet to function. It also has a distributed dictionary service that is provided worldwide