- A
Configure AS path prepending on the Cloud Router for the routes advertised to on-premises
Why wrong: AS path prepending affects outbound traffic from the AS doing the prepending. To influence traffic from Google Cloud, the on-premises router should prepend.
- B
Configure AS path prepending on the on-premises router for the routes advertised to Google Cloud
This makes the AS path longer for that connection, making it less preferred for traffic from Google Cloud.
- C
Configure AS path prepending on both sides equally
Why wrong: Only one side needs to prepend to influence direction.
- D
Use MED instead of AS path prepending
Why wrong: MED can also be used, but the question specifically asks about AS path prepending.
Question 455 of 982
PCNE Implementing Hybrid Interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company wants to use AS path prepending to influence traffic from Google Cloud to their on-premises network to prefer one Dedicated Interconnect connection over another. How should they configure AS path prepending?
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
✓
Configure AS path prepending on the on-premises router for the routes advertised to Google Cloud
AS path prepending is done on the on-premises router by adding the on-premises AS number multiple times in the BGP updates sent to Google Cloud. Google Cloud Router will then prefer the path with the shorter AS path length (fewer prepends). To make one connection less preferred, the on-premises router should prepend AS numbers on the BGP updates sent over that connection.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure AS path prepending on the Cloud Router for the routes advertised to on-premises
Why it's wrong here
AS path prepending affects outbound traffic from the AS doing the prepending. To influence traffic from Google Cloud, the on-premises router should prepend.
- ✓
Configure AS path prepending on the on-premises router for the routes advertised to Google Cloud
Why this is correct
This makes the AS path longer for that connection, making it less preferred for traffic from Google Cloud.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure AS path prepending on both sides equally
Why it's wrong here
Only one side needs to prepend to influence direction.
- ✗
Use MED instead of AS path prepending
Why it's wrong here
MED can also be used, but the question specifically asks about AS path prepending.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
- →
Implementing Hybrid Interconnectivity — study guide chapter
Learn the concepts, then practise the questions
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Implementing Hybrid Interconnectivity practice questions
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing Hybrid Interconnectivity — This question tests Implementing Hybrid Interconnectivity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure AS path prepending on the on-premises router for the routes advertised to Google Cloud — AS path prepending is done on the on-premises router by adding the on-premises AS number multiple times in the BGP updates sent to Google Cloud. Google Cloud Router will then prefer the path with the shorter AS path length (fewer prepends). To make one connection less preferred, the on-premises router should prepend AS numbers on the BGP updates sent over that connection.
What should I do if I get this PCNE question wrong?
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.
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