hardMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO statements about BFD authentication are…
Which TWO statements about BFD authentication 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
✓
BFD authentication supports both MD5 and SHA-1 hashing algorithms.
BFD authentication can use MD5, SHA-1, or SHA-256 (depending on platform). The authentication mode can be strict (mandatory) or loose (optional). Key chains are used to manage authentication keys, and the key chain must be configured before applying it to BFD. BFD authentication is supported for both single-hop and multihop sessions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
BFD authentication supports both MD5 and SHA-1 hashing algorithms.
Why this is correct
Correct. BFD authentication supports MD5 and SHA-1, and on newer platforms SHA-256 as well.
- ✓
BFD authentication can be configured in either strict or loose mode.
Why this is correct
Correct. Strict mode requires authentication on all BFD packets; loose mode allows unauthenticated packets but authenticates if present.
- ✗
BFD authentication is only supported for single-hop BFD sessions.
Why it's wrong here
Incorrect. BFD authentication is supported for both single-hop and multihop sessions.
- ✗
The BFD authentication key is configured directly under the BFD interface configuration.
Why it's wrong here
Incorrect. The key is configured using a key chain, and the key chain is then referenced in the BFD configuration.
- ✗
BFD authentication uses a pre-shared key that must be identical on both sides.
Why it's wrong here
Incorrect. While the keys must match for authentication to succeed, they are managed via key chains and can be different if using key chain IDs; the statement is misleading because the actual key material must match, but the configuration method is via key chains, not a simple pre-shared key.
Go deeper
Related to this question
About these practice questions
This 300-410 question is part of Courseiva's 1,966-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.