SPLK-1001 Basic Searching and Transforming Commands Practice Question
Exhibit
index=network sourcetype=cisco:asa | eval src_zone=case(src_ip="10.0.0.0/8","internal", 1=1,"external") | search src_zone=internal | stats count by src_zone
Refer to the exhibit. The search returns only events where src_zone is 'external'. What is the problem?
⚠ Common exam trap
Splunk often tests the misconception that the `case` function can handle any comparison operator, including CIDR matching, when in fact it requires explicit use of `cidrmatch` for IP subnet evaluation.
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
✓
The 'case' function cannot compare IP addresses to CIDR ranges
The `case` function in SPL cannot compare IP addresses to CIDR ranges directly because it expects boolean expressions, not IP-matching operators. The correct approach is to use the `cidrmatch` function within the `case` function to evaluate whether `src_ip` falls within a given CIDR range. Without `cidrmatch`, the comparison `src_ip='10.0.0.0/8'` is treated as a string equality check, which will never match an IP address to a CIDR notation string.
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 'src_ip' field is not extracted
Why it's wrong here
It is extracted.
- ✗
The default condition should be 'true()' instead of '1=1'
Why it's wrong here
1=1 works as true, but the issue is CIDR.
- ✓
The 'case' function cannot compare IP addresses to CIDR ranges
Why this is correct
Correct: case uses exact string comparison, not subnet matching.
- ✗
The 'search' command should be before 'eval'
Why it's wrong here
Order is fine.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SPLK-1001 practice question is part of Courseiva's free Splunk 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 SPLK-1001 exam.