ABSTRACT
Simulation is probably themost used experimental technique.While
it has many advantages over other methodologies, it does have its
disadvantages too. This is one reasonwhymany network simulators,
in addition to the pure simulation functionality, offer the possibility
of network emulation, that is interaction with live traffic. Basically,
this means creating special interfaces that allow bringing real
network traffic into and out of the simulation engine. In this chapter
we review several of the most important network simulators, with
emphasis on their emulation features, and discuss how effective
from the network emulation perspective is the approach they
propose.
