An engineer has implemented a QoS architecture that requires a signaling protocol to tell routers which flows of packets require special treatment.
Which two mechanisms are important building blocks to establishing and maintaining QoS in this architecture? (Choose two.)
A. policing
B. classification
C. admission control
D. tagging
E. low-latency queuing
F. resource reservation
G. packetscheduling
correct is CF
“It uses resource reservation and admission control mechanisms as key building blocks to establish and maintain QoS.”
https://www.cisco.com/c/en/us/products/ios-nx-os-software/resource-reservation-protocol-rsvp/index.html