- A
Use a Site-to-Site VPN connection between the VPC and the SaaS provider's on-premises network.
Why wrong: This assumes the provider has on-premises, which is not the case.
- B
Create a VPC peering connection and use security groups to restrict traffic.
Why wrong: VPC peering does not encrypt traffic between VPCs.
- C
Use an AWS PrivateLink endpoint (interface endpoint) in the company's VPC to connect to the SaaS provider's VPC endpoint service.
PrivateLink provides encrypted traffic within AWS and isolates the traffic.
- D
Use an AWS Transit Gateway with inter-region peering.
Why wrong: Transit Gateway does not encrypt traffic by default.
Question 1,737 of 1,748
SCS-C02 Infrastructure Security Practice Question
This SCS-C02 practice question tests your understanding of infrastructure security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 PrivateLink to connect to a SaaS provider's VPC endpoint service. The security team wants to ensure that traffic between the company's VPC and the SaaS provider's VPC is encrypted in transit and that no other AWS service can access the data. Which configuration meets these requirements?
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
✓
Use an AWS PrivateLink endpoint (interface endpoint) in the company's VPC to connect to the SaaS provider's VPC endpoint service.
Option C is correct because AWS PrivateLink uses interface VPC endpoints (powered by AWS PrivateLink) to establish a private connection between the company's VPC and the SaaS provider's VPC endpoint service. Traffic stays within the AWS network and is encrypted in transit using TLS (Transport Layer Security) when the application layer uses HTTPS, ensuring no other AWS service can intercept the data. This meets both the encryption and exclusive access requirements without traversing the internet or relying on VPNs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a Site-to-Site VPN connection between the VPC and the SaaS provider's on-premises network.
Why it's wrong here
This assumes the provider has on-premises, which is not the case.
- ✗
Create a VPC peering connection and use security groups to restrict traffic.
Why it's wrong here
VPC peering does not encrypt traffic between VPCs.
- ✓
Use an AWS PrivateLink endpoint (interface endpoint) in the company's VPC to connect to the SaaS provider's VPC endpoint service.
Why this is correct
PrivateLink provides encrypted traffic within AWS and isolates the traffic.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use an AWS Transit Gateway with inter-region peering.
Why it's wrong here
Transit Gateway does not encrypt traffic by default.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume AWS PrivateLink automatically encrypts all traffic at the network layer, but it only provides private connectivity over the AWS backbone; encryption must be implemented at the application layer (e.g., TLS), and the question's requirement for 'encrypted in transit' is satisfied only when the application uses HTTPS or similar protocols.
Detailed technical explanation
How to think about this question
AWS PrivateLink uses Network Load Balancers (NLBs) in the service provider's VPC to expose the endpoint service, and the consumer's interface endpoint creates an Elastic Network Interface (ENI) in the consumer's subnet with a private IP address. Traffic between the consumer and provider VPCs is routed through the AWS backbone and is encrypted at the application layer (e.g., TLS 1.2/1.3) if the application uses HTTPS; AWS does not provide automatic encryption at the network layer for PrivateLink, so the encryption requirement depends on the application protocol. In real-world scenarios, this is critical for compliance with standards like PCI DSS or HIPAA, where data in transit must be encrypted and isolated from other tenants.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Quick reference
OSI Model Reference
| Layer | Name | PDU | Key Protocols / Devices |
|---|---|---|---|
| 7 | Application | Data | HTTP, HTTPS, DNS, SMTP, FTP, SSH |
| 6 | Presentation | Data | TLS / SSL, JPEG, ASCII encoding |
| 5 | Session | Data | NetBIOS, RPC, SIP |
| 4 | Transport | Segment / Datagram | TCP, UDP |
| 3 | Network | Packet | IP, ICMP, OSPF — Routers |
| 2 | Data Link | Frame | Ethernet, Wi-Fi, PPP — Switches, Bridges |
| 1 | Physical | Bits | Cables, NICs, Hubs, Repeaters |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use an AWS PrivateLink endpoint (interface endpoint) in the company's VPC to connect to the SaaS provider's VPC endpoint service. — Option C is correct because AWS PrivateLink uses interface VPC endpoints (powered by AWS PrivateLink) to establish a private connection between the company's VPC and the SaaS provider's VPC endpoint service. Traffic stays within the AWS network and is encrypted in transit using TLS (Transport Layer Security) when the application layer uses HTTPS, ensuring no other AWS service can intercept the data. This meets both the encryption and exclusive access requirements without traversing the internet or relying on VPNs.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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