hardMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO statements about BFD echo mode are…
Which TWO statements about BFD echo mode are true? (Choose TWO.)
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 packets are generated by the sending router and forwarded back by the remote router.
In BFD echo mode, the sending router generates echo packets that are looped back by the remote router, allowing detection of failures without involving the remote router's control plane. This reduces CPU load on the remote router. The other statements are false because echo mode does not require a separate session for each direction, and it does not increase the number of BFD control packets.
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 packets are generated by the sending router and forwarded back by the remote router.
Why this is correct
The sending router creates echo packets that the remote router loops back.
- ✓
Echo mode reduces the processing load on the remote router's control plane.
Why this is correct
Since echo packets are looped back without control plane processing, CPU usage is reduced.
- ✗
Echo mode requires a separate BFD session for each direction.
Why it's wrong here
BFD sessions are already bidirectional; echo mode does not create additional sessions.
- ✗
Echo mode increases the number of BFD control packets sent between routers.
Why it's wrong here
Echo mode uses echo packets, not additional control packets.
- ✗
Echo mode is enabled by default on all interfaces.
Why it's wrong here
Echo mode must be explicitly configured; it is not enabled by default.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.