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H12-821_V1.0 · Question #500
H12-821_V1.0 Question #500: Real Exam Question with Answer & Explanation
The correct answer is A. The one-arm echo function refers to the loopback operation of BFD packets to detect the connectivity of the forwarding link. See the full explanation below for the reasoning.
Question
Which of the following statements about the application of BFD is correct? (Multiple choice)
Options
- AThe one-arm echo function refers to the loopback operation of BFD packets to detect the connectivity of the forwarding link
- BLinkage BFD provides fast fault detection for protocols such as OSPF and ISIS, and can quickly notify BFD of rapid detection of link failures, thereby speeding up OSPF's response to network topology changes
- CBFD single-hop detection refers to the IP connectivity detection of two directly connected systems
- DBFD multi-hop detection means that BFD can detect any path between two systems. These paths may span many hops or may overlap in some parts.
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