NSE7 Advanced VPN and Zero Trust Practice Question
A FortiGate is experiencing high CPU usage due to IPsec VPN traffic. The admin wants to offload cryptographic operations to the hardware. Which THREE conditions must be met for hardware acceleration to work? (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
✓
The FortiGate must have a compatible NP7 or CP9 processor
Hardware acceleration (CP8/CP9) requires specific conditions: supported encryption algorithms, no advanced features that disable offload, and the traffic must match a VPN policy that uses the hardware acceleration capable interface.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The FortiGate must have a compatible NP7 or CP9 processor
Why this is correct
Hardware acceleration requires specific processor models.
- ✓
The IPsec phase 2 proposal must use encryption algorithms supported by the hardware accelerator (e.g., AES-GCM)
Why this is correct
Hardware accelerators support specific algorithms; others fall back to software.
- ✗
The VPN interface must be configured with 'set acceleration-mode ipsec'
Why it's wrong here
Acceleration mode is automatically enabled; no manual setting required.
- ✓
The VPN tunnel must not be configured with features that disable offload, such as IPsec interface mode with kernel-version-dependent features
Why this is correct
Some features like certain IPsec modes or advanced inspection can disable hardware offload.
- ✗
The firewall policy using the VPN interface must not have NAT enabled
Why it's wrong here
NAT does not disable hardware acceleration for IPsec.
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 NSE7 practice question is part of Courseiva's free Fortinet 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 NSE7 exam.