CND Practice Question: Enterprise Cloud Virtual And Wireless Network Protection
An enterprise cloud security architect is hardening an Azure Kubernetes Service (AKS) cluster. The requirement is to ensure that node-to-node communication within the cluster is encrypted in transit. Which feature must be enabled during cluster creation or configuration?
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
✓
Azure CNI powered by Cilium with data plane encryption enabled
Azure CNI with Cilium supports network policies and data plane encryption (IPsec/WireGuard) for node-to-node and pod-to-pod traffic in AKS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Application Gateway Ingress Controller (AGIC)
Why it's wrong here
AGIC routes HTTP/S traffic from external clients to Kubernetes services, not node-to-node encryption.
- ✓
Azure CNI powered by Cilium with data plane encryption enabled
Why this is correct
Cilium in AKS enables encryption of container network traffic in transit between nodes using IPsec or WireGuard.
- ✗
Azure Key Vault provider for Secrets Store CSI driver
Why it's wrong here
This driver mounts secrets into pods, not network traffic encryption.
- ✗
Azure Policy for Kubernetes add-on
Why it's wrong here
Azure Policy enforces compliance and governance, but does not encrypt node-to-node network traffic.
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.
About these practice questions
One of 323 original CND practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This CND practice question is part of Courseiva's free EC-Council 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 CND exam.