- A
Port forwarding
Why wrong: Port forwarding exposes internal services to the internet without encryption, which is not secure for remote access.
- B
VPN passthrough
Why wrong: VPN passthrough allows existing VPN connections to traverse the firewall but does not create a VPN server.
- C
VPN server
A VPN server on the firewall enables remote users to establish encrypted connections to the internal network.
- D
DMZ
Why wrong: A DMZ hosts public-facing services and does not provide secure remote access to the internal network.
Question 308 of 750
Enabling VPN Server on Firewall for Secure Remote Access
This 220-1202 practice question tests your understanding of logical security concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A technician is configuring a new firewall for a small office. They need to allow remote employees to securely access the internal network. Which technology should be enabled on the firewall?
Quick Answer
The answer is to enable a VPN server on the firewall. A VPN server creates an encrypted tunnel between a remote user and the internal network, ensuring that all data transmitted over the internet remains confidential and secure from eavesdropping. This is the standard method for providing firewall VPN server remote access, as it authenticates users and protects sensitive company resources. On the CompTIA A+ Core 2 220-1202 exam, this concept tests your understanding of secure remote connectivity versus less secure alternatives like port forwarding or plain Remote Desktop Protocol. A common trap is confusing a VPN server with a simple port forward—remember that a VPN adds encryption and authentication, not just access. For a memory tip, think of the VPN as a “secure tunnel” through the firewall: it wraps your data in a protective layer before it travels across the public 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 server
A VPN server on the firewall enables secure remote access by encrypting traffic between remote employees and the internal network, typically using protocols like IPsec or SSL/TLS. This provides authenticated, encrypted tunnels that protect data in transit, which is the standard solution for secure remote connectivity.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Port forwarding
Why it's wrong here
Port forwarding exposes internal services to the internet without encryption, which is not secure for remote access.
- ✗
VPN passthrough
- ✓
VPN server
- ✗
DMZ
Why it's wrong here
A DMZ hosts public-facing services and does not provide secure remote access to the internal network.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'VPN passthrough' (which only forwards existing VPN traffic) with 'VPN server' (which terminates and creates VPN connections), leading them to select option B when the question explicitly asks for enabling secure remote access.
Detailed technical explanation
How to think about this question
A firewall acting as a VPN server typically supports IPsec (IKEv1/IKEv2) or SSL/TLS (OpenVPN, SSTP) to establish encrypted tunnels. The firewall authenticates users via credentials, certificates, or multi-factor authentication, and applies access control policies (e.g., split tunneling or full tunneling) to restrict which internal resources remote clients can reach. In real-world deployments, this is common in small offices where a dedicated VPN appliance is cost-prohibitive.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1202 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
What to study next
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Logical Security Concepts — This question tests Logical Security Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: VPN server — A VPN server on the firewall enables secure remote access by encrypting traffic between remote employees and the internal network, typically using protocols like IPsec or SSL/TLS. This provides authenticated, encrypted tunnels that protect data in transit, which is the standard solution for secure remote connectivity.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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