Building realistic Internet topologies is an important
step towards predicting the behavior of new distributed ap-
plications and protocols. We are creating topologies that
predict the distances between identifiable nodes in the In-
ternet as it is today. These nodes are not anonymous aver-
age Internet nodes, but are known by name and network
address. We are using a landmark and network coordi-
nate based approach and evaluate the characteristics of the
topologies found. We provide hints, how to select important
parameters for such topology generators.