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300-410 Practice Question: An engineer configured IP SLA 40 with a UDP echo…

An engineer configured IP SLA 40 with a UDP echo probe to monitor a remote server port 80. The IP SLA is used in a track object for a backup static route. The engineer observes that the IP SLA state is 'Timeout' even though the server is reachable via ping from the router. What is the most likely cause?

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 server is not running a UDP service on port 80; HTTP uses TCP, so the UDP probe will fail.

UDP echo probes require a service listening on the specified port. If the server does not have a UDP service on port 80 (HTTP uses TCP), the probe will timeout.

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 router's firewall is blocking UDP packets to the server.

    Why it's wrong here

    If the router's firewall were blocking, ICMP ping might also fail; the engineer confirmed ping works.

  • ✓

    The server is not running a UDP service on port 80; HTTP uses TCP, so the UDP probe will fail.

    Why this is correct

    UDP echo probes expect a UDP service on the target port. Port 80 is typically TCP, so the probe times out.

  • ✗

    The IP SLA frequency is set too high, causing the router to miss responses.

    Why it's wrong here

    Frequency does not cause timeout; it only affects how often probes are sent.

  • ✗

    The track object is misconfigured with the wrong IP SLA number.

    Why it's wrong here

    The IP SLA state is 'Timeout', indicating the probe is running but failing; the track object is not the issue.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

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.