Quick Answer
The answer is Amazon Kinesis Data Analytics, as it enables near real-time analysis of streaming VPC Flow Logs by applying SQL queries directly to data in motion. While Athena is ideal for querying logs stored in S3, it cannot process live streams; Kinesis Data Analytics continuously ingests flow logs from CloudWatch Logs via a Kinesis Data Firehose or Kinesis Data Streams, allowing the security team to detect traffic to malicious IP addresses with sub-second latency. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this question tests your understanding of real-time vs. batch analytics—a common trap is choosing Athena for its familiarity, but the key phrase “near real-time” signals a streaming service. Remember the mnemonic “KDA for live data, Athena for stored data” to avoid the S3 trap.
This ANS-C01 practice question tests your understanding of network management and operations. 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 monitors its VPC using VPC Flow Logs. The logs are sent to CloudWatch Logs. The security team wants to detect traffic to known malicious IP addresses. Which AWS service can be used to analyze the flow logs in near real-time?
AWS WAF
Why wrong: WAF protects web applications, not for analyzing flow logs.
AWS CloudTrail
Why wrong: CloudTrail records API calls, not network traffic.
Amazon Athena
Why wrong: Athena is for querying data at rest, not near real-time streaming.
Amazon Kinesis Data Analytics
Can process streaming flow logs in real-time and detect patterns.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon Kinesis Data Analytics
Amazon Athena can query VPC Flow Logs stored in S3, but for near real-time analysis, Amazon Kinesis Data Analytics (or Kinesis Data Firehose with Lambda) can process streaming logs. However, the simplest managed service for real-time pattern matching is Amazon Kinesis Data Analytics with SQL.
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
For each option: why learners choose it and why it is or isn't the right answer here.
AWS WAF
Why it's wrong here
WAF protects web applications, not for analyzing flow logs.
AWS CloudTrail
Why it's wrong here
CloudTrail records API calls, not network traffic.
Amazon Athena
Why it's wrong here
Athena is for querying data at rest, not near real-time streaming.
Amazon Kinesis Data Analytics
Why this is correct
Can process streaming flow logs in real-time and detect patterns.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
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
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.
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
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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 ANS-C01 NAT questions on configuration and troubleshooting.
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FAQ
Network Management and Operations — This question tests Network Management and Operations — Static NAT maps one inside address to one outside address..
The correct answer is: Amazon Kinesis Data Analytics — Amazon Athena can query VPC Flow Logs stored in S3, but for near real-time analysis, Amazon Kinesis Data Analytics (or Kinesis Data Firehose with Lambda) can process streaming logs. However, the simplest managed service for real-time pattern matching is Amazon Kinesis Data Analytics with SQL.
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 ANS-C01 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.
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