Exercise 2 of the Level 2 - STK Master Certification test requires terrain data. You can complete the exercise using the Terrain Server. If you are unable to access the Terrain Server, it is most likely blocked because of firewall issues. Please review how to
set up a proxy server to allow you to connect. If you are unable to do this, you can complete the exercise using the RaistingStation.pdtt, which you can download here.
Beginning with the release of STK 11.6.0, the RaistingStation.pdtt terrain file is installed with STK; you can find it in C:\Program Files\AGI\STK 12\Data\Resources\stktraining\imagery.