Quality of Service $($QoS$)$ can be implemented in three different models, namely; Best effort, Integrated Services $($IntServ$),$ and Differentiated Services $($DiffServ$).$

Compare and contrast the Integrated Services $($IntServ$)$ and Differentiated Services $($DiffServ$)$ Quality of Service $($QoS$)$ models in a network environment.

When might it be most beneficial to implement one model over the other in a network environment? Share at least one justified example.