When I open wireshark I could see the packets send by machines other than mine. How could its possible?
Example
8252 99.150192 somoeneip 239.255.255.250 SSDP NOTIFY * HTTP/1.1
8253 99.151204 fe8s0::15s34:12c8:2f2132:d99221 ff02::c SSDP NOTIFY * HTTP/1.1
8075 96.624367 otherip 239.255.255.250 SSDP NOTIFY * HTTP/1.1
Values are modified for privacy