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What is a CNAME?

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 "" may be both a web-server and an ftp-server, so two CNAME-records are defined: "" = "" and "" = "". Sometimes a single server computer hosts many different domain names (take ISPs), and so CNAME-records may be defined such as "" = "". A CNAME-record should always point to an A-record to avoid circular references.

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