Do the server daemons require IP address to name resolution?

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I have no "nameserver" entries in resolv.conf.
I have the following order in host.conf:
order hosts,bind
When I try to telnet or ftp to a IP address which has not a host name the
process hangs and I have to kill it.
It seems obvious that the server daemons won't work unless the IP addresses
can resolve to a name, but I would like to confirm my guesses and I would
also appreciate an explanation for this implementation behaviour.
TIA.
Zacarías


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