The answer is Cloud VPN and Cloud Interconnect. Cloud VPN establishes encrypted site-to-site tunnels over the internet, securing traffic between each remote office and Google Cloud, while Cloud Interconnect provides dedicated, low-latency, and reliable physical connections that bypass the public internet for consistent performance across multiple offices. On the Google Professional Cloud Developer exam, this pairing tests your understanding of hybrid connectivity options: Cloud VPN handles encrypted internet-based links, and Cloud Interconnect ensures reliability for critical workloads, with a common trap being to confuse Direct Peering—which is for direct on-premises to Google access, not hub-spoke multi-office setups—or to pick Cloud NAT, which only manages outbound internet for private instances. Remember the memory tip: “VPN for the encrypted road, Interconnect for the reliable rail.”
PCD Integrating Google Cloud services Practice Question
This PCD practice question tests your understanding of integrating google cloud services. 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 integrating a legacy application with Google Cloud using Cloud VPN. The application must be accessed from multiple remote offices over the internet. Which TWO technologies should the company use to ensure secure and reliable connectivity? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cloud Interconnect
Option A (Cloud VPN) is correct for site-to-site VPN connectivity. Option C (Cloud Interconnect) is correct for dedicated, reliable connectivity. Option B (Direct Peering) is not recommended for multi-office since it's for on-prem to Google, not hub-spoke. Option D (Cloud NAT) is for outbound internet. Option E (Private Google Access) is for on-prem to Google APIs.
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.
✓
Cloud Interconnect
Why this is correct
Provides dedicated, low-latency connections, ideal for reliable access.
Related concept
Static NAT maps one inside address to one outside address.
✗
Private Google Access
Why it's wrong here
Allows on-prem hosts to access Google APIs via private IP, not for application access.
✗
Cloud NAT
Why it's wrong here
Cloud NAT provides outbound internet to instances, not inbound connectivity.
✗
Direct Peering
Why it's wrong here
Direct peering is between on-prem and Google, not for multiple offices.
✓
Cloud VPN
Why this is correct
Provides encrypted tunnels over the internet for site-to-site connectivity.
Related concept
Static NAT maps one inside address to one outside address.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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 PCD NAT questions on configuration and troubleshooting.
Integrating Google Cloud services — This question tests Integrating Google Cloud services — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Cloud Interconnect — Option A (Cloud VPN) is correct for site-to-site VPN connectivity. Option C (Cloud Interconnect) is correct for dedicated, reliable connectivity. Option B (Direct Peering) is not recommended for multi-office since it's for on-prem to Google, not hub-spoke. Option D (Cloud NAT) is for outbound internet. Option E (Private Google Access) is for on-prem to Google APIs.
What should I do if I get this PCD 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 PCD 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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