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.
What is the maximum number of VLAN attachments that can be configured on a single 10 Gbps Dedicated Interconnect connection?
16
Why wrong: 16 is too high; that limit applies to higher bandwidth interconnects.
4
Why wrong: 4 is incorrect; the limit is 8.
2
Why wrong: 2 is too low.
8
8 VLAN attachments per 10 Gbps interconnect.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
8
A single 10 Gbps Dedicated Interconnect connection supports a maximum of 8 VLAN attachments. This limit is defined by Google Cloud's interconnect architecture, where each VLAN attachment consumes a portion of the 10 Gbps bandwidth and is mapped to a unique VLAN ID. The 8-attachment cap ensures predictable performance and avoids oversubscription on the physical link.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
16
Why it's wrong here
16 is too high; that limit applies to higher bandwidth interconnects.
4
Why it's wrong here
4 is incorrect; the limit is 8.
2
Why it's wrong here
2 is too low.
8
Why this is correct
8 VLAN attachments per 10 Gbps interconnect.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse the VLAN attachment limit for Dedicated Interconnect with the higher limits of Partner Interconnect or assume the limit scales linearly with bandwidth, leading them to select 16 or 2 instead of the correct 8.
Detailed technical explanation
Each VLAN attachment on a Dedicated Interconnect is essentially a logical interface that can carry multiple Cloud Router sessions (BGP sessions) for dynamic routing. The 8-attachment limit per 10 Gbps connection is a hard cap set by Google Cloud to prevent bandwidth contention; if you need more than 8 attachments, you must provision additional 10 Gbps connections or use a higher-capacity interconnect (e.g., 100 Gbps). In practice, this limit is critical for designing hybrid networks with multiple VPCs or on-premises segmentation, as each attachment can be associated with a different VPC or region.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Implementing hybrid interconnectivity — This question tests Implementing hybrid interconnectivity — Read the scenario before looking for a memorised answer..
The correct answer is: 8 — A single 10 Gbps Dedicated Interconnect connection supports a maximum of 8 VLAN attachments. This limit is defined by Google Cloud's interconnect architecture, where each VLAN attachment consumes a portion of the 10 Gbps bandwidth and is mapped to a unique VLAN ID. The 8-attachment cap ensures predictable performance and avoids oversubscription on the physical link.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 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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