Canon EOS-1D C - Manual (Page 97)

97
Click the Windows [Start] button  [All Programs]  [Accessories] 
[Command Prompt]. 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.
To avoid using the same IP address for the computer and other devices
on the network when configuring the IP address assigned to the camera
(page 17), change the rightmost numbers here.
In Mac OS X, open the [Terminal] application, type 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 ***.***.***.***.
To avoid using the same IP address for the computer and other devices
on the network when configuring the IP address assigned to the camera
(page 17), change the rightmost numbers here.
* For information on the [Terminal] application, refer to the Mac OS X
help.
Checking Network Settings
Windows
Macintosh
COP
Y