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Meaning of CANONICAL NAME

 
Computing Dictionary
 
 Definition: 

(CNAME) A host's official name as opposed to an alias. The official name is the first hostname listed for its internet address in the hostname database, /etc/hosts or the network information service (NIS) map hosts.byaddr ("hosts" for short). A host with multiple network interfaces may have more than one Internet address, each with its own canonical name (and zero or more aliases).

You can find a host's canonical name using nslookup if you say

        set querytype=CNAME

and then type a hostname.

 

 

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