The IpAddress key specifies the  IP address of a device. This value is the 4 IPV4 segmented number that identifies the device on the network. Typical addresses will look like:

Typical addresses will look like:

192.168.1.10

or  

10.10.1.12

For further information see https://en.wikipedia.org/wiki/IPv4.

An Example:

;*******************************************************************************
;DCM configuration example
;*******************************************************************************
[DCM_1]
ConfigType = Dcm
;The time to wait in seconds (this can be a fraction of a sec i.e. 0.5) for a TCP connection to the device
ConnectionTimeoutSec = 1.5
;The IP Address of this device as 'ddd.ddd.ddd.ddd'
IpAddress = 10.11.201.20
;The time to wait in seconds for a file transfer via SCPI
FileTransferTimeoutSec = 60
;The time to wait in seconds for a response to begin when communicating to the device via SCPI
ResponseTimeoutSec = 60