“Hon Hai Precision Ind. Co., Ltd device joined the network.”
Your “device” on your local area network is recognized by it’s physical address - or MAC Address.
A MAC address has six pairs of hexadecimal numbers. The first three pairs identify the manufacturer of the device - or more correctly the network interface in the device. In your cast the device MAC address will start with E8:9E:B4: which is Hon Hai Precision Ind. Co.,Ltd…
You can look up a MAC address vendor at MAC Vendors.
If you want to know which MAC address is associated with which IP Address, go to your command line and ping the IP Address, then type arp -a
The table on the screen will show you which MAC address - which physical address - is associated with the IP Address. Go online and look up the MAC address and you’ll know the vendor.