My IP is 172.18.57.145 my classmate IP is 172.18.56.182 (the same dorm)
Our gateway are the same,
I check my computer ARP cache table is no record of my classmate, we are using QQ communication,
Only when I use the CMD ping after his hosts have a corresponding IP - MAC records
Excuse me why before, small white,

CodePudding user response:

QQ communication through local area network (LAN), but the network server