Which two statements about the best effort model for QoS are true? (Choose two)
A.
Delay sensitive packets are given preferential treatment.
B.
The default policy identifies a delay sensitive class and a default class.
C.
The default policy identifies a delay sensitive class, best effort class, and a default class.
D.
The model is highly scalable.
E.
The model is still predominant on the Internet.
F.
The model provides guaranteed service.