Billing-Server:~ # ping domain-server
PING domain-server.zoloto (10.0.0.8) 56(84) bytes of data.
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=1 ttl=128 time=0.097 ms
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=2 ttl=128 time=0.093 ms
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=3 ttl=128 time=0.095 ms
^C
--- domain-server.zoloto ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 0.093/0.095/0.097/0.001 ms

Billing-Server:~ # ping domain-server.zoloto
PING domain-server.zoloto (10.0.0.8) 56(84) bytes of data.
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=1 ttl=128 time=0.101 ms
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=2 ttl=128 time=0.107 ms
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=3 ttl=128 time=0.087 ms
64 bytes from domain-server.zoloto (10.0.0.8): icmp_seq=4 ttl=128 time=0.110 ms
^C
--- domain-server.zoloto ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2999ms
rtt min/avg/max/mdev = 0.087/0.101/0.110/0.011 ms

Billing-Server:~ # nslookup domain-server
;; Got SERVFAIL reply from 10.0.0.8, trying next server
;; connection timed out; no servers could be reached

Billing-Server:~ # nslookup domain-server.zoloto
;; Got recursion not available from 10.0.0.8, trying next server
;; connection timed out; no servers could be reached

Billing-Server:/etc # cat host.conf
#
# /etc/host.conf - resolver configuration file
#
# Please read the manual page host.conf(5) for more information.
#
#
# The following option is only used by binaries linked against
# libc4 or libc5. This line should be in sync with the "hosts"
# option in /etc/nsswitch.conf.
#
order hosts, bind
#
# The following options are used by the resolver library:
#
order hosts,bind
multi on
nospoof on
alert on

Billing-Server:/etc # cat hosts
#
# hosts This file describes a number of hostname-to-address
# mappings for the TCP/IP subsystem.  It is mostly
# used at boot time, when no name servers are running.
# On small systems, this file can be used instead of a
# "named" name server.
# Syntax:
#
# IP-Address  Full-Qualified-Hostname  Short-Hostname
#

127.0.0.1 localhost

# special IPv6 addresses
#::1 localhost ipv6-localhost ipv6-loopback

fe00::0 ipv6-localnet

ff00::0 ipv6-mcastprefix
ff02::1 ipv6-allnodes
ff02::2 ipv6-allrouters
ff02::3 ipv6-allhosts
127.0.0.2 Billing-Server.zoloto Billing-Server
10.0.0.1   billing-server billing-server
212.220.165.69  billing-server billing-server
10.0.0.8   domain-server.zoloto domain-server
10.0.0.28 dc2008r2.zoloto dc2008r2