Which of the following statements BEST describes where shaping mechanisms should be applied?

Which of the following statements BEST describes where shaping mechanisms should be applied?
A . On all ports on the Nokia 7750 SR.
B . At the junction of high-speed to low-speed links or at places of traffic aggregation.
C . At the junction of low-speed to high-speed links or at places of traffic aggregation.
D . On low-speed WAN links.
E . Nowhere. Shaping is only performed in hardware and serviced in a round-robin.

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Answer: B