Question 383 of 500

Transactions and Event Correlation →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is to increase maxspan to 6 minutes and add maxevents=2. This works because the transaction command uses startswith and endswith to define the event boundaries, but it still relies on the maxspan window to capture all relevant events; by extending the window to 6 minutes, you give a 1-minute buffer for the firewall deny event to arrive before the IDS alert, while maxevents=2 ensures the transaction only pairs the two intended events, preventing resource-heavy groupings of unrelated events. On the Splunk SPLK-1003 exam, this tests your understanding of transaction handling for early events with startswith/endswith, a common scenario where out-of-order events break correlations—the trap is to think reversing the fields or removing boundaries will help, but the real fix is adjusting the time window and event count. Remember the memory tip: “Buffer the span, cap the count” to handle early arrivals without bloating the transaction.

SPLK-1003 Transactions and Event Correlation Practice Question

This SPLK-1003 practice question tests your understanding of transactions and event correlation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 security operations center (SOC) uses Splunk to correlate alerts from multiple sources. They have a rule that triggers a transaction when an IDS alert is followed within 5 minutes by a firewall deny event from the same source IP. The search is: `index=security sourcetype=ids OR sourcetype=firewall | transaction src_ip startswith="ids" endswith="firewall" maxspan=5m`. This works well when the deny event occurs after the alert. However, analysts are missing correlations where the firewall deny event occurs slightly before the IDS alert (up to 1 minute before). To capture these out-of-order events without significantly increasing resource usage, what should the analyst do?

Question 1hardmultiple choice

Full question →

A
Use `reverse` before transaction to process events in reverse time order.
Why wrong: Incorrect: reverse flips event order but transaction re-sorts by time, so it doesn't help capture out-of-order pairs.
B
Increase maxspan to 6 minutes and add `maxevents=2`.
Correct: A larger maxspan (6m) covers the 1-minute out-of-order scenario, and maxevents=2 prevents grouping extra events.
C
Use `sort` with time dimension and then use `eventstats` to mark pairs.
Why wrong: Incorrect: eventstats does not create a transaction; it only adds statistical calculations to each event.
D
Use `transaction src_ip maxspan=6m` without startswith/endswith and then filter for events with both sourcetypes.
Why wrong: Incorrect: This groups all events from src_ip within 6m, possibly including unrelated events, increasing resource usage.

Full breakdown with real-world context →

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

✓

Increase maxspan to 6 minutes and add `maxevents=2`.

Option A is correct because increasing maxspan to 6 minutes (5m + 1m buffer) and adding maxevents=2 ensures the transaction captures the pair even if the deny event comes up to 1 minute early, while limiting to exactly two events prevents large groupings. Option B (no startswith/endswith) would merge all events from the same src_ip within 6 minutes, potentially including unrelated events. Option C (reverse) does not help because transaction already sorts by time. Option D (eventstats) does not create a transaction.

Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Use `reverse` before transaction to process events in reverse time order.
Why it's wrong here
Incorrect: reverse flips event order but transaction re-sorts by time, so it doesn't help capture out-of-order pairs.
✓
Increase maxspan to 6 minutes and add `maxevents=2`.
Why this is correct
Correct: A larger maxspan (6m) covers the 1-minute out-of-order scenario, and maxevents=2 prevents grouping extra events.
Related concept
Standard ACLs match source addresses.
✗
Use `sort` with time dimension and then use `eventstats` to mark pairs.
Why it's wrong here
Incorrect: eventstats does not create a transaction; it only adds statistical calculations to each event.
✗
Use `transaction src_ip maxspan=6m` without startswith/endswith and then filter for events with both sourcetypes.
Why it's wrong here
Incorrect: This groups all events from src_ip within 6m, possibly including unrelated events, increasing resource usage.

Common exam traps

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Detailed technical explanation

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.

TExam Day Tips

Check inbound versus outbound direction.
Read the ACL from top to bottom.
Look for a broader permit or deny above the intended line.

Key takeaway

ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Real-world example

How this comes up in practice

A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.

What to study next

Got this wrong? Here's your next step.

Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SPLK-1003 ACL questions on filtering logic and placement.

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FAQ

Questions learners often ask

What does this SPLK-1003 question test?

Transactions and Event Correlation — This question tests Transactions and Event Correlation — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: Increase maxspan to 6 minutes and add `maxevents=2`. — Option A is correct because increasing maxspan to 6 minutes (5m + 1m buffer) and adding maxevents=2 ensures the transaction captures the pair even if the deny event comes up to 1 minute early, while limiting to exactly two events prevents large groupings. Option B (no startswith/endswith) would merge all events from the same src_ip within 6 minutes, potentially including unrelated events. Option C (reverse) does not help because transaction already sorts by time. Option D (eventstats) does not create a transaction.

What should I do if I get this SPLK-1003 question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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Last reviewed: Jun 24, 2026

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This SPLK-1003 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-1003 exam.