Which architecture provides a way to deliver end-to-end…

Which architecture provides a way to deliver end-to-end QoS as required by real-time voice and video business applications?

A.
IntServ

B.
DiffServ

C.
LLQ

D.
ToS

E.
DSCP

Explanation:
DiffServ is known as “Hop-by-Hop” and not “End-to-End”