Implementation of the test cases described in Sanjay Ramroop: Performance evaluation of DiffServ networks using the ns-3 simulator
(http://www.eng.uwi.tt/depts/elec/staff/rvadams/sramroop/Report_parts/Sanjay%20Ramroop%20807004374%20ECNG%203020%20Report%20April%204th%20Final.pdf)

Experiment 1
  Differentiation between forwarding classes

Experiment 2:
  AF drop precedence

Experiment 3
  Flow isolation and bandwidth efficiency

Experiment 5
  Comparison of DiffServ and Best Effort