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Domain Name System, or DNS, is the most recognized system for assigning
addresses to Internet web servers (hosts). like an international phone
number, the domain name system helps to give every Internet server a
easy-to-spell address. Simultaneously, a domain keeps the techinical
numbers away from users.
eg. www.Dreamdrivendesigns.com or yoursitename.com
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*CNAME Record*
CNAME records are domain name aliases.
Often computers on the Internet have multiple functions such as web-server, ftp-server, chat-server etc.
To mask this, CNAME-records can be used to give a single computer multiple names (aliases). For example computer “www.mycomputer.com” may be both a web-server and an ftp-server, so two CNAME-records are defined: “www.mycomputer.com” = “xyz.com” and “ftp.mycomputer.com” = “xyz.com”.
Sometimes a single server computer hosts many different domain names such as web servers that host many sites. In this example many CNAME records may be defined such as “www.abc.com” = “www.xyz.com”.
The most popular use the CNAME-record type is to provide access to a web-server using both the standard “www.domain.com” and “domain.com” (without the www). This is usually done by creating an A-record for the short name (without www), and a CNAME-record for the www name pointing to the short name.
CNAME-records can also be used when a computer or service needs to be renamed, to temporarily allow access through both the old and new name.
A CNAME-record should always point to an A-record to avoid circular references.