350-501 Automation and Quality of Services Practice Question
Which two mechanisms are used for congestion avoidance in a QoS policy? (Choose two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
WRED
WRED (Weighted Random Early Detection) and tail drop are congestion avoidance mechanisms that manage queue fullness before congestion occurs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CBWFQ
Why it's wrong here
CBWFQ is a queuing mechanism, not avoidance.
- ✓
WRED
Why this is correct
WRED drops packets randomly to avoid congestion.
- ✗
Policing
Why it's wrong here
Policing is a traffic condition mechanism, not avoidance.
- ✗
LLQ
Why it's wrong here
LLQ is a congestion management mechanism (queuing).
- ✓
Tail drop
Why this is correct
Tail drop drops packets when queue is full.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-501 question from scratch — 971 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.