Kindly explain the following lines in details.
1) controls {
inet 127.0.0.1 allow { localhost; } keys { rndckey;
};
};
2) zone "." IN {
type hint;
file "named.ca";
};
3) zone "0.0.12/.in addr.arpa" IN {
type master;
file "named.local";
allow-update { none; }
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