The answer is that the traffic is traversing a transit VPC with additional NAT instances. This is correct because when a Direct Connect link is not saturated, high latency typically stems from inefficient routing rather than bandwidth constraints; a transit VPC architecture that forces traffic through EC2 instances acting as NAT or proxy gateways adds extra hops and processing overhead, directly increasing round-trip time for SAP database calls. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this question tests your understanding of how network path design impacts latency for SAP workloads, often trapping candidates who assume bandwidth is the sole culprit or who confuse Direct Connect with VPN-based solutions. A key memory tip is to remember that "more hops mean more drops" in latency—so if the link is not full, look for unnecessary middleboxes like NAT instances in the routing path.
PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 runs SAP on AWS and uses AWS Direct Connect for on-premises connectivity. The operations team notices that the SAP system is experiencing high latency when accessing an on-premises database. The network team confirms that the Direct Connect link is not saturated. What is the most likely cause of the high latency?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The traffic is traversing a transit VPC with additional NAT instances
If the Direct Connect link is not saturated, the issue could be routing inefficiency. A transit VPC with EC2 instances acting as NAT or proxy can introduce additional hops and latency. VPN over Direct Connect is not relevant. MPLS is the underlying technology for Direct Connect. Increasing bandwidth does not reduce latency caused by routing.
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.
✓
The traffic is traversing a transit VPC with additional NAT instances
Why this is correct
Additional hops in a transit VPC increase latency.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The Direct Connect link is using a public VIF instead of a private VIF
Why it's wrong here
Public/private VIF affects reachability, not latency directly.
✗
The Direct Connect bandwidth is insufficient
Why it's wrong here
The team confirmed the link is not saturated.
✗
The on-premises network is using a VPN over the Direct Connect link
Why it's wrong here
VPN can add overhead but is not the most likely cause if latency is high but link not saturated.
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 PAS-C01 NAT questions on configuration and troubleshooting.
Operations and Maintenance — This question tests Operations and Maintenance — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The traffic is traversing a transit VPC with additional NAT instances — If the Direct Connect link is not saturated, the issue could be routing inefficiency. A transit VPC with EC2 instances acting as NAT or proxy can introduce additional hops and latency. VPN over Direct Connect is not relevant. MPLS is the underlying technology for Direct Connect. Increasing bandwidth does not reduce latency caused by routing.
What should I do if I get this PAS-C01 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 PAS-C01 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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