- A
A single 10Gbps Dedicated Interconnect connection with one VLAN attachment and one BGP session
Why wrong: A single connection does not meet 99.99% SLA; redundancy is required.
- B
A single 100Gbps Dedicated Interconnect connection with two VLAN attachments and two BGP sessions
Why wrong: A single physical connection, even with multiple VLANs, does not provide redundancy for the physical link.
- C
Two 10Gbps Dedicated Interconnect connections, each with its own VLAN attachment and BGP session, from the same provider
Two redundant connections are required for 99.99% SLA.
- D
Two Partner Interconnect connections with 99.9% SLA each
Why wrong: Partner Interconnect maximum SLA is 99.9% without multiple connections, and 99.99% requires two connections, but the scenario specifies Dedicated Interconnect.
PCNE Practice Question: Designing, Planning, and Prototyping a GCP Network
This PCNE practice question tests your understanding of designing, planning, and prototyping a gcp network. 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.
An organization wants to connect its on-premises data center to Google Cloud using Dedicated Interconnect. They require 99.99% availability SLA. Which configuration meets this requirement?
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
Two 10Gbps Dedicated Interconnect connections, each with its own VLAN attachment and BGP session, from the same provider
Dedicated Interconnect offers 99.99% SLA when you have two separate physical connections (each 10Gbps or 100Gbps) from the same provider, each with its own VLAN attachment and BGP session, and they are configured in a redundant manner.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A single 10Gbps Dedicated Interconnect connection with one VLAN attachment and one BGP session
Why it's wrong here
A single connection does not meet 99.99% SLA; redundancy is required.
- ✗
A single 100Gbps Dedicated Interconnect connection with two VLAN attachments and two BGP sessions
Why it's wrong here
A single physical connection, even with multiple VLANs, does not provide redundancy for the physical link.
- ✓
Two 10Gbps Dedicated Interconnect connections, each with its own VLAN attachment and BGP session, from the same provider
Why this is correct
Two redundant connections are required for 99.99% SLA.
Related concept
Access ports place end devices into a single VLAN.
- ✗
Two Partner Interconnect connections with 99.9% SLA each
Why it's wrong here
Partner Interconnect maximum SLA is 99.9% without multiple connections, and 99.99% requires two connections, but the scenario specifies Dedicated Interconnect.
Common exam traps
Common exam trap: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Trap categories for this question
Scenario analysis trap
Partner Interconnect maximum SLA is 99.9% without multiple connections, and 99.99% requires two connections, but the scenario specifies Dedicated Interconnect.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
- Access ports place end devices into a single VLAN.
- Trunk ports carry multiple VLANs between switches.
- Allowed VLAN lists decide which VLANs can cross a trunk.
- Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
- Use show vlan brief to verify access VLANs.
- Use show interfaces trunk to verify trunk state and allowed VLANs.
- Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related PCNE questions on switching, trunking, and access-port configuration.
- →
Designing, Planning, and Prototyping a GCP Network — study guide chapter
Learn the concepts, then practise the questions
- →
Designing, Planning, and Prototyping a GCP Network practice questions
Targeted practice on this topic area only
- →
All PCNE questions
1,000 questions across all exam domains
- →
Google Professional Cloud Network Engineer study guide
Full concept coverage aligned to exam objectives
- →
PCNE practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related PCNE practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Configuring Network Services practice questions
Practise PCNE questions linked to Configuring Network Services.
Implementing Hybrid Interconnectivity practice questions
Practise PCNE questions linked to Implementing Hybrid Interconnectivity.
Managing, Monitoring, and Optimising Network Operations practice questions
Practise PCNE questions linked to Managing, Monitoring, and Optimising Network Operations.
Designing, Planning, and Prototyping a GCP Network practice questions
Practise PCNE questions linked to Designing, Planning, and Prototyping a GCP Network.
Implementing VPC Instances practice questions
Practise PCNE questions linked to Implementing VPC Instances.
Implementing network security practice questions
Practise PCNE questions linked to Implementing network security.
Implementing a Virtual Private Cloud practice questions
Practise PCNE questions linked to Implementing a Virtual Private Cloud.
PCNE fundamentals practice questions
Practise PCNE questions linked to PCNE fundamentals.
PCNE scenario practice questions
Practise PCNE questions linked to PCNE scenario.
PCNE troubleshooting practice questions
Practise PCNE questions linked to PCNE troubleshooting.
Practice this exam
Start a free PCNE practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this PCNE question test?
Designing, Planning, and Prototyping a GCP Network — This question tests Designing, Planning, and Prototyping a GCP Network — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: Two 10Gbps Dedicated Interconnect connections, each with its own VLAN attachment and BGP session, from the same provider — Dedicated Interconnect offers 99.99% SLA when you have two separate physical connections (each 10Gbps or 100Gbps) from the same provider, each with its own VLAN attachment and BGP session, and they are configured in a redundant manner.
What should I do if I get this PCNE question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related PCNE questions on switching, trunking, and access-port configuration.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.