NSE7 Advanced VPN and Zero Trust Practice Question
An administrator is configuring SSL VPN on FortiGate and wants to allow users to access internal applications via a web portal without installing any client software. Which SSL VPN mode should be used?
⚠ Common exam trap
Watch out — candidates often confuse 'Web mode' with 'Tunnel mode' because both are SSL VPN features, but only Web mode provides clientless access via a browser portal, whereas Tunnel mode always requires the FortiClient software to be installed.
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
✓
Web mode
Web mode (option C) is correct because it enables users to access internal web applications through a FortiGate SSL VPN web portal using only a standard browser, with no client software installation required. The portal acts as a reverse proxy, translating HTTPS requests from the client to the internal application servers, making it ideal for clientless remote access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DTLS
Why it's wrong here
DTLS is a UDP transport for the SSL VPN tunnel, not a portal mode; it accelerates tunnel-mode traffic. The web portal requires web mode, which renders applications in a browser without a client. DTLS would be chosen when reducing tunnel overhead for latency-sensitive traffic.
- ✗
Tunnel mode
Why it's wrong here
Tunnel mode requires FortiClient or another IPsec/SSL client to build a virtual interface, so it cannot deliver clientless browser access. Web mode is the portal-based alternative. Tunnel mode is chosen when users need full network-layer access to multiple subnets and applications.
- ✓
Web mode
Why this is correct
Web mode delivers SSL VPN access entirely through a browser, proxying internal web applications without any client installation. This directly satisfies the stem's constraint of portal-based access with no software deployment, unlike tunnel mode, which requires FortiClient or a comparable client to establish the virtual adapter.
- ✗
Split tunneling
Why it's wrong here
Split tunnelling is a routing setting controlling which destinations traverse the tunnel, not an SSL VPN access mode. It cannot provide clientless portal access. Split tunnelling is chosen in tunnel mode to send only corporate-bound traffic through the VPN while other traffic goes direct.
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
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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.