Sometimes companies register multiple domain names for their brand-names but still wish to maintain a single website. In such cases, a CNAME Record maybe used to forward traffic to their actual website.
Example:
www.abc.in could be CNAME to www.abc.com.
The most popular use of the CNAME Record, is to provide access to a Web Server using both the standard www.yourdomainname.com and yourdomainname.com (without the www). This is usually done by adding a CNAME Record for the www name pointing to the short name [while creating an A Record for the shorter name (without www)].
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.
