What makes the DiffServ model more scalable than the IntServ model? (Choose all that apply

What makes the DiffServ model more scalable than the IntServ model? (Choose all that apply.)

What makes the DiffServ model more scalable than the IntServ model? (Choose all that apply.)

A.
DiffServ makes use of per-aggregate QoS instead of per-flow QoS.

B.
DiffServ makes use of hop-by-hop signaling which allows DiffServ to scale to a larger number of application flows.

C.
DiffServ is capable of implementing admission control either locally on the routers or be offloaded to a central policy server using the COPS protocol.

D.
DiffServ routers are not compelled to track the state information for each individual flow.

Explanation:
Incorrect:
B. No hop-by-hop signaling uses per-hop behavior
C. This is a feature of both models
Sources: Cisco IP QoS Introduction
http://www.cisco.com/en/US/tech/ CK5 43/ CK7 66/technologies_white_paper09186a00800a3e2f.shtml



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