I have 3 windows computers in my home network (UVERSE). They are connected to the network with ethernet cables. Each has its own computer name (e.g., COMPA, COMPB, and COMPC) and all belong to the same workgroup (HOMEWG). All 3 PCs use AVIRA Antivirus and COMODO Firewall. COMPA AND COMPB run Windows 7 64-bit and COMPC runs Windows Vista 64-bit.
When I ping COMPC from COMPA (ping COMPC), the first line returned says "pinging COMPC.gateway.2wire.net (126.96.36.199). When I ping COMPC from COMPB, the first line returned says "pinging COMPC.gateway.2wire.net (192.168.1.100).
192.168.1.100 is the correct IP address for COMPA.
Why does COMPA report the wrong IP address? I don't even know where that address comes from.