Huawei SD-WAN establishes secure tunnels between SD-WAN edge devices (CPEs, AR routers, and controllers) using tunneling protocols.
✅ B. GRE over IPsec (Correct Answer)
GRE (Generic Routing Encapsulation) over IPsec is the primary tunneling method used in Huawei SD-WAN.
GRE provides multi-protocol encapsulation, while IPsec ensures encryption and security.
Used for secure communication over public WAN links (e.g., the internet, LTE, MPLS, etc.).
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