Web Sites, Domain Names, And Name Servers (What`s DNS All About?)... - The Internet would...
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The Internet would be pretty hard to use if you had to remember all those IP Addresses when you wanted to visit a web page, so a naming scheme is used that allows you to enter a name that is easy to remember instead of a sequence of numbers. So, how does your computer get the IP Address of a web site when you type in the name? That's where Domain Name Servers do their job.
Name Servers. A Name Server holds the information that relates the IP Addresses for a web site to the names used to access that web site. If you want to have a web site with a domain name, you have to register or purchase (more like rent) the domain name from a service call a registrar. When I registered the domain name for my web site, I told the registrar what Name Server I was using, Most people will use the Name Servers provided by their hosting facility (where they rent the server space for their web site). That Name Server is configured to have a "zone" for my domain and that zone contains records that relate a name to an IP address, this is called an "A Record". An "MX Record" is used to identify the mail server for that zone, for example, I have an "A Record" for my domain that points to the IP address of the web server, and the "MX Record" points to the mail server for my domain. These may or may not be on the same server. When someone sends me email, their mail server will request the Name Server for my domain and will get it's IP Address, then it can request the MX Record and get it's IP Address, and then it can send packets of mail to the mail server for my domain.
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