DNS servers which can convert most
in to their
corresponding number. These DNS servers are called
recursive DNS servers.
This kind of server can not change the names of any
out there. Instead, they simply ask other DNS servers the IP
for a given DNS node.
This kind of DNS server does not depend on one's ISP's DNS servers
to resolve a given name, but directly contacts the relevant authoritative
DNS servers anywhere on the internet to resolve a given DNS node.