Quick Answer
The answer is 10.1.25.1. This event value does not match because the WILDCARD match_type pattern '10.*.25' in Splunk lookups requires the string to begin with '10.' and end with '.25', with the asterisk acting as a wildcard that matches any characters in between. The value 10.1.25.1 ends with '.1' instead of '.25', so it falls outside the pattern's constraints, while options like 10.abc.25 or 10.1.2.25 are correctly matched because they satisfy both the starting and ending conditions. On the SPLK-1003 exam, this concept tests your understanding of how wildcard pattern matching works in lookup definitions, often appearing in questions that ask you to identify which values a given pattern will or will not match. A common trap is forgetting that the wildcard only matches the middle portion and does not extend to the end of the string. Remember the memory tip: "Start and end are fixed; the wildcard only fills the middle."
This SPLK-1003 practice question tests your understanding of advanced visualization and lookups. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 lookup configured with WILDCARD match_type for pattern '10.*.25' is not matching some events. Which of the following event values would NOT be matched by this lookup?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "NOT"
Why it matters: Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
10.1.2.25
Why wrong: Matches pattern; wildcard matches '1.2'.
10.1.25.1
Does not match because it does not end with '.25'.
10.1.25
Why wrong: Matches pattern: starts with '10.' and ends with '.25'.
10.2.25
Why wrong: Matches pattern.
10.10.25
Why wrong: Matches pattern.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
10.1.25.1
Option E is correct because the pattern '10.*.25' matches any string that starts with '10.' and ends with '.25'. Option E ends with '.1', so it does not match. Options A, B, C, and D all match because they start with '10.' and end with '.25' (D has additional segments but the wildcard matches them).
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.
10.1.2.25
Why it's wrong here
Matches pattern; wildcard matches '1.2'.
10.1.25.1
Why this is correct
Does not match because it does not end with '.25'.
Clue confirmation
The clue word "NOT" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
10.1.25
Why it's wrong here
Matches pattern: starts with '10.' and ends with '.25'.
10.2.25
Why it's wrong here
Matches pattern.
10.10.25
Why it's wrong here
Matches pattern.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 SPLK-1003 NAT questions on configuration and troubleshooting.
Advanced Visualization and Lookups — study guide chapter
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FAQ
Advanced Visualization and Lookups — This question tests Advanced Visualization and Lookups — Static NAT maps one inside address to one outside address..
The correct answer is: 10.1.25.1 — Option E is correct because the pattern '10.*.25' matches any string that starts with '10.' and ends with '.25'. Option E ends with '.1', so it does not match. Options A, B, C, and D all match because they start with '10.' and end with '.25' (D has additional segments but the wildcard matches them).
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 SPLK-1003 NAT questions on configuration and troubleshooting.
Yes — watch for: "NOT". Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
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