Which technology can be used to help ensure the efficient transport of VoIP traffic?

A.
DNS

B.
QoS

C.
H.323

D.
RSTP

Explanation:
Answer option B is correct.
Quality of Service (QoS) is a technology for prioritizing traffic on the network. VoIP requires optimization of bandwidth to ensure users do not experience “call drops” created by lack of bandwidth due to congestion issues. QoS is a mechanism to provide this optimization.