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.
Answer: B