ping localhost returns Reply from ::1: time<1ms

Ping to localhost was working but not now.
hosts file has an entry for 127.0.0.1 localhost
networks file also has an entry for localhost 127

following is the output

C:\Documents and Settings\Administrator>ping localhost

Pinging neuron [::1] with 32 bytes of data:

Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms

Ping statistics for ::1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0msStart Free Trial