Google PCA Manage implementation of cloud architecture Practice Question
An organization needs to connect an on-premises data center to Google Cloud using Dedicated Interconnect with a 10 Gbps link. They require high availability and want to achieve 99.99% SLA. What is the minimum number of VLAN attachments and Interconnect connections needed?
⚠ Common exam trap
Many candidates confuse VLAN attachments with physical redundancy, thinking multiple VLAN attachments on a single Interconnect connection can achieve the 99.99% SLA, but the SLA explicitly requires two separate Interconnect connections for physical diversity.
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 Interconnect connections, each with one VLAN attachment.
To achieve 99.99% SLA with Dedicated Interconnect, you need two separate Interconnect connections (for physical diversity) and each connection must have at least one VLAN attachment. The SLA requires redundant paths; a single Interconnect connection, even with multiple VLAN attachments, does not provide physical diversity and thus cannot meet the 99.99% uptime target.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Two Interconnect connections, each with one VLAN attachment.
Why this is correct
Two connections in different edge availability domains provide 99.99% SLA.
- ✗
One Interconnect connection with two VLAN attachments.
Why it's wrong here
One connection is single point of failure; SLA is lower.
- ✗
Four Interconnect connections with one VLAN attachment each.
Why it's wrong here
Overkill; not minimal.
- ✗
Two Interconnect connections, each with two VLAN attachments.
Why it's wrong here
More than needed; additional attachments don't improve SLA beyond two connections.
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Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
SLA
A Service Level Agreement (SLA) is a contract between a service provider and a customer that defines the level of service expected, including metrics like uptime, response time, and penalties for non-compliance.
Key term
Data
Data is raw, unprocessed information, like numbers, words, or measurements, that can be stored, processed, and analyzed by computers.
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Written by Johnson Ajibi, MSc IT Security
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