Aoa

Dear all expert
Mere pass 100 IPs ka local area network hai ab mujhe ye maloom karma hai ka 101 ya koe bhe ip os ka user name kia hai or wo kis user k istimaal mai hai
User name sai ping karwa kar kar mai IP to DEkh sakta ho but IP sai user name kis tarha dekh sakta ho pls mujhe ye bataden

Shukria