350-501 Services Practice Question
Which TWO statements about QoS policy propagation via BGP (QPPB) are correct?
⚠ Common exam trap
Cisco often tests the misconception that QPPB is an IETF standard or that it can be applied bidirectionally, when in fact it is a Cisco proprietary feature limited to inbound direction only.
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
✓
QPPB can be applied on inbound direction only.
QPPB can be applied on inbound direction only. QPPB uses BGP policy to classify traffic based on IP precedence or QoS group, and the classification is performed on incoming traffic before any routing decision. The outbound direction is not supported for QPPB classification.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
QPPB can be applied on inbound direction only.
Why this is correct
It applies to traffic coming from customers.
- ✗
QPPB is an IETF standard.
Why it's wrong here
QPPB is Cisco proprietary.
- ✓
It uses BGP communities to mark QoS on traffic received from customer.
Why this is correct
BGP community carries QoS marking.
- ✗
It uses MPLS EXP bits to propagate QoS.
Why it's wrong here
QPPB uses BGP, not MPLS EXP.
- ✗
It dynamically adjusts BGP attributes based on QoS policy.
Why it's wrong here
It is the opposite: BGP attributes influence QoS marking.
Go deeper
Related to this question
About these practice questions
This 350-501 question is part of Courseiva's 971-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.