If you are on the same network, or VLAN, or subnet as someone else – you will probably notice that if you ping their hostname it will return with a IPv6 address. Ping srv01 Pinging srv01.contoso.com [fe80::c09::d4e6::189f::f661%3] with 32 bytes of data Reply from fe80::c09::d4e6:189f:f661%3: time<1ms Reply from fe80::c09::d4e6:189f:f661%3: