 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| n |
Simulation an
indispensable tool to study the behavior of
|
|
|
computer
communication networks
|
|
|
|
¨ |
Network protocol
evaluation
|
|
|
|
¨ |
Security attacks,
countermeasures
|
|
|
|
¨ |
Interdependencies
among critical infrastructures
|
|
|
| n |
Most studies
examine a few to a few thousands of nodes
|
|
|
¨ |
Useful to
understand protocol behaviors (for example)
|
|
|
|
¨ |
Limitations of
existing tools
|
|
|
| n |
Large-scale
network simulation offers
|
|
|
|
¨ |
Verify validity
of simulation results on small networks
|
|
|
|
¨ |
Examine issues of
scale
|
|
|
|
¨ |
Validate
theoretical models for large networks
|
|
|
| n |
Here, focus on packet-level simulation of wired networks
|
|
|
|
¨ |
Discrete event
simulation
|
|
|
|
¨ |
Many tools exist:
NS2, Opnet, Qualnet, …
|
|