200-201 Security Monitoring Practice Question
Which component of a SIEM is responsible for converting log data from various sources into a standard format?
⚠ Common exam trap
It's easy for candidates to confuse normalization with aggregation, thinking that simply collecting logs from multiple sources is enough to make them comparable, when in fact normalization is the crucial step that standardizes the data format.
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
✓
Normalization
Normalization is the SIEM component that parses incoming log data from diverse sources (e.g., syslog, Windows Event Log, NetFlow) and maps the fields into a common, standardized schema. This process ensures that fields like source IP, destination IP, and timestamp are consistently named and formatted, enabling effective correlation and analysis across heterogeneous devices.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Aggregation
Why it's wrong here
Aggregation collects and consolidates logs from multiple sources into a central store, but it does not transform their schemas. Normalisation is the component that parses and maps disparate fields into a common format. Aggregation would be correct where the requirement is centralised collection and retention rather than field-level standardisation.
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Alerting
Why it's wrong here
Alerting generates notifications when rule or threshold conditions match, consuming normalised and correlated data rather than producing it. Normalisation performs the field mapping into a common schema. Alerting would be correct if the question asked which component notifies analysts once suspicious activity is detected.
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Correlation
Why it's wrong here
Correlation links related events across sources to identify patterns or incidents; it operates on already-parsed data and performs no schema conversion. Normalisation is what maps vendor-specific fields into a standard format. Correlation would be the right answer if the question asked how the SIEM detects multi-source attack patterns.
- ✓
Normalization
Why this is correct
Normalization standardizes log data.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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