Cisco
300-415 · Question #266
300-415 Question #266: Real Exam Question with Answer & Explanation
The correct answer is B: BFD. Bidirectional Forwarding Detection (BFD) is the protocol used in Cisco SD-WAN to actively monitor the status, quality metrics (loss, latency, jitter), and MTU of data plane tunnels, including IPsec tunnels.
Security and Quality of Service
Question
Which protocol detects path status (up/down), measures loss/latency/jitter, and measures the quality of the IPsec tunnel MTU?
Options
- ADTLS
- BBFD
- COMP
- DIP-SLA
Explanation
Bidirectional Forwarding Detection (BFD) is the protocol used in Cisco SD-WAN to actively monitor the status, quality metrics (loss, latency, jitter), and MTU of data plane tunnels, including IPsec tunnels.
Common mistakes.
- A. DTLS (Datagram Transport Layer Security) is used for control plane connections in Cisco SD-WAN to secure communication between control plane elements and WAN Edge devices, not for data plane path monitoring.
Concept tested. BFD for SD-WAN tunnel monitoring and quality
Topics
#BFD#SD-WAN#Tunnel monitoring#Path performance
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