QoS can be performed in which of the following modes? (Select 3 Answers)
A. Best-effort service
B. Integrated service
C. Differentiated service
D. Assured forwarding service
QoS can be performed in which of the following modes? (Select 3 Answers)
A. Best-effort service
B. Integrated service
C. Differentiated service
D. Assured forwarding service