Google PCA Practice Question: Designing and Planning a Cloud Solution Architecture
This PCA practice question tests your understanding of designing and planning a cloud solution architecture. 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.
An organization wants to establish a dedicated, low-latency connection between their on-premises data center and GCP with a guaranteed SLA of 99.99% uptime. They anticipate high bandwidth usage but want to avoid per-GB egress charges. Which connectivity option should they choose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Dedicated Cloud Interconnect
Dedicated Cloud Interconnect provides a direct physical connection with SLA up to 99.99%, high bandwidth, and no egress charges, ideal for high-volume hybrid workloads.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Dedicated Cloud Interconnect
Why this is correct
Dedicated Interconnect provides 99.99% SLA, high bandwidth, and no egress charges, meeting all requirements.
Related concept
Static NAT maps one inside address to one outside address.
✗
Partner Cloud Interconnect
Why it's wrong here
Partner Interconnect offers SLAs but may not provide 99.99% uptime; also egress charges apply.
✗
Cloud VPN with HA VPN gateway
Why it's wrong here
VPNs use the public internet, so latency is higher, no dedicated SLA, and egress charges apply.
✗
Classic VPN
Why it's wrong here
Classic VPN is a basic option with no SLA, high latency, and egress charges.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCA NAT questions on configuration and troubleshooting.
Designing and Planning a Cloud Solution Architecture — This question tests Designing and Planning a Cloud Solution Architecture — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Dedicated Cloud Interconnect — Dedicated Cloud Interconnect provides a direct physical connection with SLA up to 99.99%, high bandwidth, and no egress charges, ideal for high-volume hybrid workloads.
What should I do if I get this PCA question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCA NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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