Why standard CBWFQ completely ruins voice calls
Think giving voice its own bandwidth guarantee is enough? Drop your answer in the comments before the timer runs out.
The question
Why is standard CBWFQ alone insufficient for delay-sensitive voice traffic?
The answer
A CBWFQ lacks strict priority scheduling
CBWFQ guarantees minimum bandwidth, but voice needs a strict priority queue to eliminate jitter and packet delay. Don't fall for B—CBWFQ handles bandwidth fine!
Exam tip
Read what the question is actually asking before looking at the options. The wrong answers here are ones candidates genuinely pick — each is true of something adjacent, just not of what was asked.