e.g. "1 2 3 5 6 8 9 10 11 12 13 14 15 16 17"

These parameters are the IDs of those hosts in the matrix file that should be used as Landmark hosts in the GNP experiment. These numbers must be in increasing order. The IDs in the matrix file are assumed to range from 0 to N-1. In this example, 15 IDs from 0,1,...,19 are chosen to be Landmark hosts. The host IDs in matrix that are not chosen as Landmarks here will be treated as ordinary hosts in the GNP computations.