Ever tried knowing the Hostname from an IP address. Sure you can do so.
In big networks you might be unable to memorize all IP address to point to the particular user. Or you might be using DHCP and since it dynamically assigns IP address to connecting IP capable devices, hence the need to check the hostname from IP.
You might need the following command handy as you monitor your internet utilization and just see the IP address and not the hostname. Of course hostname provides better representation of the user behind the device.
Try to enter the following command on the command prompt if you are using a Windows computer.
ping -a xxx.xxx.xxx.xxx
xxx’s refer to the IP address you try to find hostname.