In this chapter we introduced the Traffic Modeling module of the Tangram-II
tool. This module offers several possibilities to the user, such as: (a) use
statistics from real traces; (b) choose from different traffic models (which
includes Markovian, FBM and FARIMA models); (c) calculate descriptors from the
models to be able to match parameters and/or verify statistical differences from
the model to the measured data; (d) create a ``complete'' performance model
which includes the traffic model and the resources under study; (e) solve it via
simulation or analysis, and (f) conduct experiments with traffic generators over
a laboratory environment. We also encourage the user to go through the Traffic
Generation tool, which will be described in the next chapter.