In which three ways does QoS provide better network service VoIP quality? (Choose three.)

In which three ways does QoS provide better network service VoIP quality? (Choose three.)
A . minimizes priority queuing
B . manages network congestion
C . improves loss characteristics
D . supports dedicated bandwidth
E . decreases traffic priorities
F . increases packet size

Answer: BCD

Explanation:

In general, QoS provides better (and more predictable) network service by providing the following features:

– Supporting dedicated bandwidth

– Improving loss characteristics

– Avoiding and managing network congestion

– Shaping network traffic

– Setting traffic priorities across the network

Reference: https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/qos_solutions/QoSVoIP/QoSVoIP.pdf