DNS
DNS is an Internet service that translates domain names into IP addresses. Because domain names are alphabetical they are easier to remember. The internet however, is really based on IP-addresses. Everytime you use a domain name, therefore, a DNS service must translate the name into the corresponding IP-address.For example: The domain name www.example.com translates to 192.168.0.10
The DNS system infact is its own network. If one DNS server doesn’t know how to translate a particular domain name, it asks another one and so on, until the correct Ip-address is returned.
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jc8654 said,
August 31, 2007 @ 2:40 pm
If you move your website from one server to another, your IP address will change as your connection to the world wide web is from a different location. When you do this, you will need to update the DNS records to point to the new server. This information should be supplied from your webhost. When you do make the change, it can take between 24-48 hours to spread across the world so careful planning is sometimes needed to minimise downtime. Often today however, people start hitting the new server within a few hours.