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Which protocol detects path status (up/down), measures loss/latency/jitter, and measures the quality of the IPsec tunnel MTU?
Correct Answer: B
Bidirectional Forwarding Detection (BFD) runs via the DTLS session between the remote site and the regional hub. BFD is a detection protocol that provides fast forwarding path failure detection times between two adjacent routers. It is used in SD-WAN to determine path liveliness (up/down) and quality (loss/latency/jitter and IPsec tunnel MTU).