Which statement about the DiffServ model is true?
A. DiffServ provides traffic management using QoS classifications.
B. DiffServ specifies a mechanism for classifying and managing network traffic and providing QoS onmodern IP networks.
C. DiffServ is based on building a virtual circuit in the Internet using the bandwidth reservation technique.
D. DiffServ is a way to provide the assurance of sufficiently low delay and packet loss for certain types ofapplications or traffic.
