- A
Configure a NAT gateway in the VPC and route traffic through it
Why wrong: Incorrect; NAT gateway still uses internet for S3 access.
- B
Create a VPC endpoint for S3 and attach it to the Lambda's VPC
Correct; a VPC endpoint enables private connectivity.
- C
Use VPC peering to connect to the S3 bucket's VPC
Why wrong: Incorrect; S3 is a service, not in a VPC; VPC peering is not applicable.
- D
Assign a public IP to the Lambda and use an internet gateway
Why wrong: Incorrect; public IP exposes the Lambda to the internet.
Question 879 of 1,000
hardMultiple ChoiceObjective-mapped
CCSP Practice Question: A company uses AWS and needs to allow a Lambda…
This CCSP practice question tests your understanding of ccsp exam topics. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 uses AWS and needs to allow a Lambda function in a VPC to access an S3 bucket without traversing the internet. Which solution meets this requirement securely?
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
✓
Create a VPC endpoint for S3 and attach it to the Lambda's VPC
VPC endpoints (Gateway or Interface) allow private access to AWS services without internet traversal. For S3, a Gateway endpoint is commonly used.
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.
- ✗
Configure a NAT gateway in the VPC and route traffic through it
- ✓
Create a VPC endpoint for S3 and attach it to the Lambda's VPC
Why this is correct
Correct; a VPC endpoint enables private connectivity.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use VPC peering to connect to the S3 bucket's VPC
Why it's wrong here
Incorrect; S3 is a service, not in a VPC; VPC peering is not applicable.
- ✗
Assign a public IP to the Lambda and use an internet gateway
Why it's wrong here
Incorrect; public IP exposes the Lambda to the internet.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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 CCSP NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this CCSP question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Create a VPC endpoint for S3 and attach it to the Lambda's VPC — VPC endpoints (Gateway or Interface) allow private access to AWS services without internet traversal. For S3, a Gateway endpoint is commonly used.
What should I do if I get this CCSP 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 CCSP 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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Last reviewed: Jul 4, 2026
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.
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