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300-410 Statements about BFD echo mode is true? Practice Question
Which of the following statements about BFD echo mode is true?
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
✓
Echo mode allows the local router to detect failures without requiring the remote router to send BFD control packets.
BFD echo mode is an optional mode where the local router sends echo packets to the remote router, which loops them back. This reduces the processing load on the remote router because it does not need to generate BFD control packets. Echo mode is enabled by default on Cisco IOS-XE.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Echo mode increases the load on the remote router because it must process echo packets.
Why it's wrong here
Echo mode actually reduces load on the remote router because the remote router simply loops back the echo packets without processing them as BFD control packets.
- ✗
Echo mode is disabled by default and must be explicitly enabled.
Why it's wrong here
Echo mode is enabled by default on Cisco IOS-XE.
- ✗
Echo mode uses the same timer values as the BFD control packets.
Why it's wrong here
Echo packets are sent at a faster rate than control packets, typically every 50 ms, independent of the configured BFD timers.
- ✓
Echo mode allows the local router to detect failures without requiring the remote router to send BFD control packets.
Why this is correct
Correct. In echo mode, the local router sends echo packets that are looped back; if they stop returning, a failure is detected, reducing the need for control packets from the remote.
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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.