Where it says Notice that the bitmap image displayed here is different from the one displayed in Step 8. The text NLB Test is missing from this image.
This confirms that the default web page of the two servers, PLABSA01 and PLABDM01, on the cluster PLABDC01-NLB, are indeed distinguishable from each other.
Do they mean PLABDC01 instead of PLABDM01? Is that a typo?