ABSTRACT

At present, the user community widely employs three main free

software network emulators:

• Dummynet • NIST Net • NetEm

All of these three emulators are of production quality. They are

available in operating systems that are extensively used for research,

such as Linux and FreeBSD. In addition to being used directly,

these emulators are also integrated into testbed-based network

emulators. For example, Emulab reportedly uses Dummynet on its

FreeBSD nodes and NetEm on its Linux nodes [108].