Which of the following tunneling technologies does Huawei SD-WAN solution use to establish data channels?

Question

Options

• AGRE Over IPsec
• BVXLAN
• CMPLS
• DIPSec

• A
  73% (38)
• B
  8% (4)
• C
  15% (8)
• D
  4% (2)

Explanation

Huawei's SD-WAN solution uses GRE over IPsec to establish data channels because this combination provides both the flexibility of GRE tunneling (supporting multicast, routing protocols, and non-IP traffic) and the security of IPsec encryption - exactly what enterprise WAN overlays require. VXLAN (B) is a Layer 2 overlay technology designed for data center network virtualization, not WAN tunneling. MPLS (C) is a carrier-provided transport technology that operates beneath the SD-WAN overlay, not a tunneling protocol SD-WAN itself uses to build its channels. Plain IPsec alone (D) lacks the tunneling encapsulation headers needed to carry diverse traffic types across heterogeneous underlay networks, which is why GRE is layered on top of it.

Memory tip: Think "GRE wraps the packet, IPsec locks the box" - Huawei SD-WAN needs both the wrapper (GRE) for flexibility and the lock (IPsec) for security, so the answer is always the combination, not either alone.

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