The answer is AWS Lambda and Amazon OpenSearch Service, which together enable real-time log analysis from CloudWatch Logs. CloudWatch Logs can stream log data directly to OpenSearch for indexing and visualization, while subscription filters can invoke a Lambda function to process each log event in real time for pattern detection and alerting. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of real-time versus batch services: Athena and Glue are batch-oriented, and Kinesis Data Analytics requires an intermediate Kinesis stream, not a direct CloudWatch Logs destination. A common trap is selecting Athena because it queries logs, but it cannot process streaming data. For real-time analysis, remember the direct integration path: CloudWatch Logs subscription filter → Lambda or CloudWatch Logs stream → OpenSearch. A helpful memory tip is “Stream or Subscribe, not Query or Batch” — if the scenario demands immediate detection of security threats like failed logins, you need a service that reacts to each log event as it arrives, not one that scans stored files.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 is using Amazon CloudWatch Logs to collect application logs. The security team wants to detect patterns that indicate security threats, such as multiple failed login attempts. Which TWO services can be used together to perform real-time log analysis and alerting?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon OpenSearch Service
Options A and C are correct because CloudWatch Logs can stream logs to Amazon OpenSearch Service for analysis, and CloudWatch Logs can also be used with subscription filters to invoke a Lambda function for real-time processing. Option B is wrong because Amazon Athena is for querying data in S3, not real-time streaming. Option D is wrong because Kinesis Data Analytics is for streaming data but requires a Kinesis stream; it is not directly integrated with CloudWatch Logs as a destination. Option E is wrong because AWS Glue is a batch ETL service, not for real-time.
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.
✗
Amazon Kinesis Data Analytics
Why it's wrong here
CloudWatch Logs cannot directly stream to Kinesis Data Analytics; it would need a Kinesis stream.
✓
Amazon OpenSearch Service
Why this is correct
CloudWatch Logs can stream logs to OpenSearch Service for analysis and visualization.
Related concept
Static NAT maps one inside address to one outside address.
✓
AWS Lambda
Why this is correct
CloudWatch Logs subscription filters can invoke a Lambda function for real-time processing.
Related concept
Static NAT maps one inside address to one outside address.
✗
AWS Glue
Why it's wrong here
Glue is a batch ETL service, not suitable for real-time log analysis.
✗
Amazon Athena
Why it's wrong here
Athena is for querying data in S3, not real-time streaming from CloudWatch Logs.
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 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
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 SCS-C02 NAT questions on configuration and troubleshooting.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Amazon OpenSearch Service — Options A and C are correct because CloudWatch Logs can stream logs to Amazon OpenSearch Service for analysis, and CloudWatch Logs can also be used with subscription filters to invoke a Lambda function for real-time processing. Option B is wrong because Amazon Athena is for querying data in S3, not real-time streaming. Option D is wrong because Kinesis Data Analytics is for streaming data but requires a Kinesis stream; it is not directly integrated with CloudWatch Logs as a destination. Option E is wrong because AWS Glue is a batch ETL service, not for real-time.
What should I do if I get this SCS-C02 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 SCS-C02 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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Question Discussion
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