mediumMultiple SelectObjective-mapped
CCNP Practice Question: Which three statements about Cisco SD-WAN…
Which three statements about Cisco SD-WAN security and segmentation are true? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Data plane traffic between vEdge routers is encrypted using IPsec tunnels.
Cisco SD-WAN uses IPsec for data plane encryption and supports multiple VPN segments (VRFs) for traffic isolation. Control plane encryption is also provided using DTLS or TLS. The data plane encryption is between vEdge routers, not between vSmart and vEdge. VPN segmentation is configured on vEdge routers, not on vSmart. The vBond orchestrator does not participate in data plane encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Data plane traffic between vEdge routers is encrypted using IPsec tunnels.
Why this is correct
Correct because IPsec is used to encrypt all data traffic traversing the overlay tunnels between WAN Edge routers.
- ✓
Control plane traffic between vSmart and vEdge routers is secured using DTLS or TLS.
Why this is correct
Correct because control plane communication is encrypted with DTLS (default) or TLS to protect OMP and other signaling.
- ✓
VPN segmentation in SD-WAN allows traffic from different tenants or departments to be isolated using separate VRFs on the vEdge routers.
Why this is correct
Correct because VPNs (similar to VRFs) provide Layer 3 isolation; each VPN has its own routing table and forwarding instance on the vEdge.
- ✗
Data plane encryption is performed between vSmart controllers and vEdge routers to protect OMP updates.
Why it's wrong here
Incorrect because data plane encryption applies to traffic between vEdge routers, not between vSmart and vEdge; control plane encryption already protects OMP.
- ✗
VPN segmentation is configured on the vSmart controller and pushed to vEdge routers via OMP.
Why it's wrong here
Incorrect because VPN segmentation is configured locally on the vEdge routers; vSmart distributes policy and routes but does not define VPNs.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.