PK0-005 Practice Question: Basics of IT Infrastructure and IT Project Management
A project involves integrating an on-premises IT infrastructure with a public cloud provider. The project team must ensure secure connectivity. Which of the following should be implemented?
⚠ Common exam trap
Candidates often confuse VPN with VLAN, thinking both provide secure segmentation, but VLANs only isolate traffic within a local network and offer no encryption or protection across the internet.
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
✓
VPN
A VPN (Virtual Private Network) is the correct choice because it creates an encrypted tunnel over the public internet between the on-premises infrastructure and the public cloud provider, ensuring secure connectivity. Technologies like IPsec or TLS-based VPNs authenticate both endpoints and encrypt all traffic, preventing eavesdropping and tampering during transit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DNS
Why it's wrong here
DNS resolves domain names to IP addresses and does not provide security.
- ✓
VPN
Why this is correct
A VPN secures data in transit over the internet by encrypting the connection.
- ✗
NAT
Why it's wrong here
NAT translates private IP addresses to public ones, but does not secure the connection.
- ✗
VLAN
Why it's wrong here
A VLAN logically separates network traffic but does not provide encryption or security across the internet.
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 PK0-005 practice question is part of Courseiva's free CompTIA 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 PK0-005 exam.