Originally Posted by
Fiel
DNS - Translates names (Southperry.net) to IP addresses (198.96.94.120)
And adding to that, reverse DNS (rDNS) does the opposite, but much much much more horribly, since you can have infinite names resolve to a single IP address, but most ISPs will only let you reverse an IP address to a single name, which is why you'll see oddities like this;
nslookup southperry.net
Non-authoritative answer:
Name: southperry.net
Address: 198.96.94.120
Buuuuut
nslookup 198.96.94.120
Non-authoritative answer:
Name: eosian-enterprises.com
Address: 198.96.94.120
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