CNAME usage ?

[Veeraraju_Mareddi]

Dear Friends,

There is a need of two names for single IP Address.

I have created two A records for the same ip as follows:

$ORIGIN rajuveera.com.
WEB          	IN   A 12.2.1.3
WEB1		IN   A 12.2.1.3


Its working fine. But I dont know what is the benifit of CNAME type.
Can any one explain this ?

Thanks 
Raju
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