It has already been noted that each network node has an
If the IP address is 'static' then it is pre-assigned and
The FreeRTOS+TCP API function
takes a default IP address (among other addresses) as one of its parameters.
The default IP address
is used as a static IP address if
ipconfigUSE_DHCP is set to 0, or if
ipconfigUSE_DHCP is set to 1 but a DHCP server
cannot be contacted.