Which statement about the DiffServ QoS deployment architecture is true?
A.
DiffServ does not differentiate traffic types and thus cannot provide service levels.
B.
DiffServ architecture differentiates and classifies various types of traffic and provides several levels of
service based on that classification.
C.
Resource Reservation Protocol is an example of a DiffServ mechanism where each router on the path
for packet transmission is informed of the upcoming packet stream.
D.
DiffServ architecture provides QoS by assuring treatment for a specific traffic flow.