Seo Master present to you: 
 What is Domain Server?
A domain server is also known as Domain authenticator or Domain  controller. The function of Domain Server in to give authorization to  access the network. The word Domain Server and Domain Name server (DNS)  are often confused by the people. Domain server and Domain name server(  DNS) are two different things. A Domain name server (DNS) contains the  IP address of the website and their work is to map the Domain name with  the IP address. The standard and correct way to pronounce Domain name  Server (DNS)   is "Name server". Domain name servers (DNS) is a kind of  protocol or lets say a pre written mathematical rule  which governs how  two computers share information with each other on the internet. DNS is  responsible for sharing of information either on world wide platform or  even on small platform like ARPAnet.
Let it be TCP or IP protocol, Domain name server function the same. when  ever a user type any Domain name like www.webhostingasia.blogspot.com   domain name convert this user query into a machine recogniziable  address like 18.42.154.42 which is recognized as IP address. So now the  other computer on the network say on internet can locate your location.  It's like you are tracking a car trough GPS technology.
Check the IP adress of a website it will be some thing like  18.42.154.42, now open internet explorer and copy paste 18.42.154.42 and  you see a website. Now you can open a website in two way either through  Domain name of the website like www.yourwebsite.com or by directly  knowing the IP address of this website. Domain name servers are made to  handle this problem of domain mapping. Lets say if  Domain name servers  (DNS) where not present then every time we have to open a website then  we have to remember the big mathematical digit called ip address of the  website. Web would not have existed without DNS name resolution also  called as Domain mapping.
You can also learn>> 
How to create a website How to find Out IP address of my Domain name?
Though there are many tools available online to find out what ip adress  your website is using but i am gonna be sharing with you the best trick  to find out the IP address of your website without any tool.
Find which other Domain Name your web server company is hosting?  
2013, By: Seo Master