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Which two technologies can be implemented to improve the quality of the customer’s VoIP traffic?

A regional operation center deployed SQL servers that were synchronized with the company’s backend storage servers by using a 768 Kbps link.
Although network congestion is not a frequent issue, the VoIP service suffers a serious degradation. Which two technologies can be implemented to improve the quality of the customer’s VoIP traffic? (Choose two)
A. A decrease in the wan interface buffer size
B. LLQ for management traffic
C. cRTP
D. TCP/UDP filtering based on NBAR
E. TCP traffic prioritization
F. LFI
G. TCP starvation
Correct Answer: CF