ImageGear for C and C++ on Windows v19.4 - Updated
LDK vs. SLU
User Guide > Licensing and Distributing > Runtime Licensing > Automatically Reported Runtime (Node-Locked) > LDK vs. SLU

Both the License Development Kit and the Server Licensing Utility perform the same function of registering the Runtime license for the system on which it will be run. Both are provided in order to give you some options.