hardMultiple SelectObjective-mapped
350-401 Practice Question: Which three statements about the Cisco Enterprise…
Which three statements about the Cisco Enterprise WAN design principles 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
✓
SD-WAN architecture separates the control plane and data plane, allowing centralized policy management.
Enterprise WAN design focuses on connecting remote sites reliably and efficiently. SD-WAN decouples control and data planes for centralized management. Dual-homing provides redundancy. MPLS VPNs offer any-to-any connectivity but with a full mesh of VRFs. Option A is correct because SD-WAN's centralized controller manages policies and path selection. Option B is correct because dual-homing to different provider routers improves availability. Option D is correct because MPLS VPNs use VRFs to isolate customer routing, allowing overlapping addresses. Option C is incorrect because DMVPN uses dynamic tunnels (mGRE/NHRP), not static IPsec tunnels. Option E is incorrect because DMVPN does not require a full mesh; it uses a hub-and-spoke or partial mesh topology.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
SD-WAN architecture separates the control plane and data plane, allowing centralized policy management.
Why this is correct
Correct because SD-WAN uses a controller-based approach where the control plane is centralized, simplifying policy deployment.
- ✓
Dual-homing a branch office to two different service provider routers increases WAN availability.
Why this is correct
Correct because dual-homing provides redundancy; if one link or provider fails, traffic can use the other.
- ✗
DMVPN requires a full mesh of static IPsec tunnels between all spoke routers.
Why it's wrong here
Incorrect because DMVPN uses dynamic mGRE tunnels and NHRP to build tunnels on demand, not static full mesh.
- ✓
MPLS Layer 3 VPNs use Virtual Routing and Forwarding (VRF) instances to provide customer isolation.
Why this is correct
Correct because MPLS L3VPNs assign a VRF per customer, keeping routing tables separate and allowing overlapping IP addresses.
- ✗
DMVPN requires a full mesh of IPsec tunnels between all spoke routers.
Why it's wrong here
Incorrect because DMVPN typically uses a hub-and-spoke topology; spokes do not need to form tunnels with each other unless configured for spoke-to-spoke.
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.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-401 question from scratch — 1,175 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.