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GCDL Practice Question: A CISO asks why Google Cloud's security model is…
This GCDL practice question tests your understanding of a ciso asks why google cloud's security model is…. 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 CISO asks why Google Cloud's security model is described as a 'defense-in-depth' approach. Which explanation best describes this concept in the context of Google Cloud's infrastructure security?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Defense in depth means customers are responsible for all security layers, with Google providing only the physical infrastructure
This incorrectly attributes all security responsibility to customers. Defense in depth in Google Cloud means Google and customers each implement security at their respective layers, with multiple controls at each layer.
B
Distractor review
Defense in depth means that Google uses a single, very strong encryption algorithm to protect all customer data
Defense in depth is about multiple independent layers of security — not a single strong control. One encryption algorithm, however strong, is a single layer.
C
Distractor review
Defense in depth means Google deploys security controls only at the network perimeter, creating a strong outer boundary
This describes perimeter security — the opposite philosophy. Defense in depth explicitly rejects the 'hard outer shell, soft interior' model and instead places controls at every layer.
D
Best answer
Defense in depth means security is implemented as multiple independent layers — physical security, hardware attestation, network encryption, hypervisor isolation, and application-level IAM — so that bypassing any single layer does not compromise the entire system
This correctly describes defense in depth. Google's infrastructure security has independent layers: secure physical facilities, Titan security chips for hardware attestation, hypervisor isolation between tenants, encrypted network traffic, and IAM at the application layer. An attacker must bypass all relevant layers simultaneously — dramatically harder than defeating a single control.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
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More questions from this exam
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Question 1
A traditional retailer currently maintains its own data centers, purchasing servers every 3–5 years and paying for facilities, power, and staff regardless of demand. When it migrates its workloads to the public cloud, which change in cost model does it experience?
Question 2
An e-commerce company plans its infrastructure for peak shopping events (e.g., Black Friday) which drive 50× normal traffic. On-premises, they must maintain 50× capacity year-round. In the cloud, they provision 50× capacity only during peak periods. Which cloud characteristic enables this cost optimization?
Question 3
Which term describes the process by which organizations integrate digital technology into all areas of their business, fundamentally changing how they operate and deliver value to customers?
Question 4
When a company moves from maintaining its own data center to using Google Cloud, which operational responsibility does Google assume that the company previously managed?
Question 5
A hospital runs a patient records system that must remain on-premises due to strict regulatory data residency requirements. However, they also want to use cloud-based AI for diagnostic imaging analysis. Which cloud deployment model best describes their architecture?
Question 6
What is virtualization in the context of cloud computing, and why is it fundamental to how cloud providers deliver services?
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FAQ
Questions learners often ask
What does this GCDL question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Defense in depth means security is implemented as multiple independent layers — physical security, hardware attestation, network encryption, hypervisor isolation, and application-level IAM — so that bypassing any single layer does not compromise the entire system — Defense in depth means security is implemented as multiple independent layers, so that the failure or bypass of any single layer does not result in a full compromise. Google Cloud implements defense in depth through: physical security, hardware security (Titan chip), secure boot, hypervisor isolation, network encryption, application-layer authentication, and customer-level IAM. No single layer's failure exposes the entire system.
What should I do if I get this GCDL 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 GCDL NAT questions on configuration and troubleshooting.
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This GCDL 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 GCDL exam.