Canon EOS 1D X Mark II - Manual (Page 138)

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 Windows
Open the Windows [Command Prompt], then type ipconfig /all and
press the <Enter> key.
The IP address assigned to the computer is displayed, as well as the
subnet mask, gateway, and DNS server information.
 Mac OS
In Mac OS X, open the [Terminal] application, enter ifconfig -a, and
press the <Return> key. The IP address assigned to the computer is
indicated in the [en0] item by [inet], in the format “***.***.***.***”.
* For information about the [Terminal] application, refer to the Mac OS X help.
To avoid using the same IP address for the computer and other
devices on the network, change the rightmost number when
configuring the IP address assigned to the camera in the processes
described on page 144.
Checking Network Settings
Example: 192.168.1.10