642-642 practice - PrepKeys

Q2 Single choice

A major media company recently deployed a new converged network. The original network design used separate networks for graphics and video, interactive data, and voice. The company has been experiencing problems with voice traffic in the new converged network. Most of the time voice quality is perfectly acceptable. Periodically voice quality exhibits unacceptable choppy voice signals, and occasionally calls are dropped. At this time the company is not willing to simply add bandwidth to the network.

Which QoS solution would most likely help to resolve the problem?

A
Prioritize voice traffic as the highest priority to ensure that voice traffic is always serviced by the priority queue.
B
Use advanced technologies to compress all video and graphics traffic on the network.
C
Use TCP header compression and LFI to reduce delays.
D
Use class-based weighted fair queuing to prioritize voice traffic with a higher weight than all other traffic.