The answer is Dedicated Interconnect, as it provides a direct physical connection between your on-premises network and Google Cloud, supporting 10 Gbps per circuit and scaling up to 100 Gbps, which perfectly meets the requirement for high bandwidth hybrid connectivity from 10 to 80 Gbps with guaranteed low latency. This option offers dedicated, non-shared bandwidth, ensuring consistent performance for latency-sensitive workloads, whereas Partner Interconnect relies on a third-party provider and cannot guarantee the same level of dedicated throughput. On the Google Professional Cloud Network Engineer exam, this question tests your understanding of when to choose dedicated versus partner connectivity, with a common trap being to select Partner Interconnect because it offers flexible bandwidth tiers—but the key differentiator is that only Dedicated Interconnect provides a private, non-shared circuit with predictable performance. A useful memory tip is to think "Dedicated for Direct, Dedicated for Deterministic"—if you need guaranteed bandwidth and low latency, always choose the direct physical link.
PCNE Implementing hybrid interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is planning to migrate workloads to Google Cloud and needs to establish hybrid connectivity with high bandwidth (10 Gbps) and low latency. They also require the ability to scale bandwidth up to 80 Gbps in the future. Which TWO options should they consider?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Dedicated Interconnect
Dedicated Interconnect provides direct, private physical connections between your on-premises network and Google Cloud, supporting 10 Gbps or 100 Gbps per circuit. This meets the requirement for high bandwidth (10 Gbps) and low latency, and allows scaling up to 80 Gbps by adding multiple 10 Gbps circuits or using a 100 Gbps circuit. It is the only option that offers dedicated, non-shared bandwidth with guaranteed performance.
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.
✗
CDN Interconnect
Why it's wrong here
For connecting to CDN providers, not general hybrid connectivity.
✓
Dedicated Interconnect
Why this is correct
Supports up to 10 Gbps per attachment and can scale up to 80 Gbps with multiple attachments.
Related concept
Read the scenario before looking for a memorised answer.
✗
Direct Peering
Why it's wrong here
Used for peering with Google and other networks, not for customer hybrid connectivity.
✗
Cloud VPN with multiple tunnels
Why it's wrong here
Maximum throughput is about 3 Gbps per tunnel, not suitable for 10 Gbps.
✓
Partner Interconnect
Why this is correct
Offers bandwidth up to 10 Gbps and can be scaled by adding more connections.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that Direct Peering or Cloud VPN can meet high-bandwidth, low-latency requirements, but Direct Peering lacks SLA and scalability, and Cloud VPN is limited by internet performance and cannot guarantee 10 Gbps.
Detailed technical explanation
How to think about this question
Dedicated Interconnect uses IEEE 802.1Q VLAN tagging to isolate traffic over a single physical circuit, and you can aggregate multiple 10 Gbps circuits using LACP (Link Aggregation Control Protocol) to achieve up to 80 Gbps. In contrast, Partner Interconnect relies on a service provider's MPLS or Layer 2 network, which introduces additional latency and potential bandwidth contention, though it can also scale to 80 Gbps via multiple 10 Gbps VLAN attachments. The key distinction is that Dedicated Interconnect provides a direct physical cross-connect in a Google Cloud colocation facility, while Partner Interconnect uses a third-party intermediary.
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.
TExam Day Tips
→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
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Dedicated Interconnect — Dedicated Interconnect provides direct, private physical connections between your on-premises network and Google Cloud, supporting 10 Gbps or 100 Gbps per circuit. This meets the requirement for high bandwidth (10 Gbps) and low latency, and allows scaling up to 80 Gbps by adding multiple 10 Gbps circuits or using a 100 Gbps circuit. It is the only option that offers dedicated, non-shared bandwidth with guaranteed performance.
What should I do if I get this PCNE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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