How did the /etc/resolv.conf appear?

[Eric]

a at zeos.net wrote:
> The automatically installed /etc/resolv.conf
> contains the next:
>
> nameserver 82.207.67.2
> nameserver 213.179.244.18
>
> Today I discovered that this servers is not servers of FreeBSD.org 
> or InterNIC, but of my ISP.
>
> I wonder how the system found these IP addresses?
>
> Are these entries created during installation?
>
> Elisey Babenko
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>   
do you use DHCP?