Ping computername - result format

I am trying PING command on my Windows 7 PC after many months. While doing this, I notice the following result:

Ping using computer name:

D:\>ping amdwin764 Pinging AMDWIN764 [fe80::ac53:546f:a730:8bd6%11] with 32 bytes of data: Reply from fe80::ac53:546f:a730:8bd6%11: time=1ms Reply from fe80::ac53:546f:a730:8bd6%11: time=1ms Reply from fe80::ac53:546f:a730:8bd6%11: time=1ms Reply from fe80::ac53:546f:a730:8bd6%11: time=1ms Ping statistics for fe80::ac53:546f:a730:8bd6%11: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 1ms, Maximum = 1ms, Average = 1ms 

Ping using IP address:

D:\>ping 192.168.1.2 Pinging 192.168.1.2 with 32 bytes of data: Reply from 192.168.1.2: bytes=32 time=75ms TTL=128 Reply from 192.168.1.2: bytes=32 time=1ms TTL=128 Reply from 192.168.1.2: bytes=32 time=1ms TTL=128 Reply from 192.168.1.2: bytes=32 time=1ms TTL=128 Ping statistics for 192.168.1.2: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 1ms, Maximum = 75ms, Average = 19ms 

Why am I not getting the Ping results with Numeric IP address in my first example?

Thanks, Kamlesh

2 Answers

It is pinging using IPv6. You can force the ping command to use the IPv4 command using the -4 option.

c:\ > ping -4 AMDWIN764

I believe what you are seeing with the host name is the IPv6 IP address. Without knowing for sure I'd guess that when you ping an IP address you ping that IP address, and when you ping a host name if it tries to resolve it as an IPv6 IP address and if it succeeds that IP is what you see.