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350-401 Practice Question: Which three statements about IP SLA probe types…
Which three statements about IP SLA probe types and their characteristics are true? (Choose three.)
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 UDP jitter operation measures one-way delay, jitter, and packet loss in both directions.
Different IP SLA probe types measure different network metrics. UDP jitter measures one-way delay, jitter, and packet loss. ICMP echo measures round-trip time and packet loss. TCP connect measures the time to establish a TCP connection. HTTP probes measure the time to retrieve a web page. The probe type determines what metrics are available and how the probe is configured.
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 UDP jitter operation measures one-way delay, jitter, and packet loss in both directions.
Why this is correct
Correct because UDP jitter probes timestamp packets at both ends to compute one-way metrics and can detect packet loss.
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The ICMP echo operation measures round-trip time and can also provide jitter calculations.
Why this is correct
Correct because ICMP echo measures RTT, and when multiple probes are sent, jitter can be calculated from the variation in RTT.
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The TCP connect operation measures the time to establish a TCP three-way handshake.
Why this is correct
Correct because this probe type measures the time from SYN to SYN-ACK completion, indicating application-layer responsiveness.
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The HTTP operation measures the time to resolve the DNS name of the target web server.
Why it's wrong here
Incorrect because HTTP probes measure the time to retrieve a web page (including TCP connect and HTTP GET), but DNS resolution time is not part of the HTTP probe; it can be measured separately with a DNS probe.
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The ICMP echo operation requires the IP SLA responder to be enabled on the target device.
Why it's wrong here
Incorrect because ICMP echo uses standard ICMP, which does not require the IP SLA responder; the responder is only needed for UDP-based probes.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.