Quick Answer
The answer is 20 ms. This default inter-packet interval for an IP SLA UDP jitter operation defines the fixed delay between successive packets sent within a single probe, allowing the operation to measure one-way delay, jitter, and packet loss accurately across the network. On the Cisco CCNP ENARSI 300-410 exam, this value tests your understanding of IP SLA configuration defaults, often appearing in questions that ask you to identify the correct interval or to troubleshoot a jitter probe that is not behaving as expected. A common trap is confusing this 20 ms interval with the default frequency of the probe (which is 60 seconds) or assuming the interval changes with the codec type. Remember: the inter-packet interval stays at 20 ms regardless of the codec or payload size you configure. For a quick memory anchor, think "UDP Jitter sends a packet every 20 milliseconds—like a metronome ticking at 50 beats per second."
This 300-410 practice question tests your understanding of ip sla. 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.
What is the default inter-packet interval (in milliseconds) for an IP SLA UDP Jitter operation?
10 ms
Why wrong: 10 ms is not the default; it can be configured.
20 ms
Correct. The default inter-packet interval is 20 ms.
50 ms
Why wrong: 50 ms is not the default.
100 ms
Why wrong: 100 ms is not the default.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
20 ms
The default inter-packet interval for UDP Jitter is 20 milliseconds. This is the delay between sending successive packets within a single probe.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
10 ms
Why it's wrong here
10 ms is not the default; it can be configured.
20 ms
Why this is correct
Correct. The default inter-packet interval is 20 ms.
Related concept
Read the scenario before looking for a memorised answer.
50 ms
Why it's wrong here
50 ms is not the default.
100 ms
Why it's wrong here
100 ms is not the default.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
IP SLA — This question tests IP SLA — Read the scenario before looking for a memorised answer..
The correct answer is: 20 ms — The default inter-packet interval for UDP Jitter is 20 milliseconds. This is the delay between sending successive packets within a single probe.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 19, 2026
This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.
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