fedora 7:
[xxxx@localhost etc]$ ping localhost
PING localhost.localdomain (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=1 ttl=64 time=0.072 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=2 ttl=64 time=0.083 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=3 ttl=64 time=0.092 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=4 ttl=64 time=0.105 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=5 ttl=64 time=0.084 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=6 ttl=64 time=0.086 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=7 ttl=64 time=0.085 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=8 ttl=64 time=0.084 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=9 ttl=64 time=0.089 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=10 ttl=64 time=0.085 ms
--- localhost.localdomain ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9000ms
rtt min/avg/max/mdev = 0.072/0.086/0.105/0.012 ms
[xxxx@localhost etc]$ ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.075 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.088 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.088 ms
64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.083 ms
64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.087 ms
64 bytes from 127.0.0.1: icmp_seq=6 ttl=64 time=0.092 ms
64 bytes from 127.0.0.1: icmp_seq=7 ttl=64 time=0.089 ms
64 bytes from 127.0.0.1: icmp_seq=8 ttl=64 time=0.084 ms
64 bytes from 127.0.0.1: icmp_seq=9 ttl=64 time=0.085 ms
64 bytes from 127.0.0.1: icmp_seq=10 ttl=64 time=0.092 ms
--- 127.0.0.1 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 8999ms
rtt min/avg/max/mdev = 0.075/0.086/0.092/0.008 ms
[xxxx@localhost etc]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
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