- A
The server's default gateway is set to the firewall's LAN IP
Why wrong: This is necessary for the server to reach the internet but does not affect inbound connections from the internet.
- B
The firewall's NAT is disabled
Why wrong: NAT translates private IPs to public ones, but if the server is accessible internally, NAT might be working; the issue is more specific to forwarding rules.
- C
Port forwarding rules are not configured on the firewall
Without port forwarding, the firewall does not know which internal device should receive incoming traffic on ports 80/443, so external requests are dropped.
- D
The server has a public IP address assigned
Why wrong: If the server had a public IP, it would likely be accessible, but the scenario states it uses a private IP (192.168.x.x), so this is not the case.
Quick Answer
The answer is that port forwarding rules are not configured on the firewall. This is the most likely missing configuration because port forwarding is the mechanism that tells your firewall where to send incoming internet traffic; without a rule mapping external requests on ports 80 and 443 to the internal static IP 192.168.1.10, the firewall will drop those packets even if its own security policies allow HTTP and HTTPS. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of NAT and routing—a common trap is assuming that simply allowing the traffic through the firewall is enough, when in fact you must explicitly forward the ports to the server’s private IP. Remember the mnemonic “Forward to Find,” meaning you must forward external ports to find the internal server.
220-1101 Network Configuration Concepts Practice Question
This 220-1201 practice question tests your understanding of network configuration concepts. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 company's web server is accessible from the internal network but not from the internet. The server has a static IP of 192.168.1.10. The firewall is configured to allow HTTP and HTTPS traffic. What is the most likely missing configuration?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
Port forwarding rules are not configured on the firewall
Port forwarding directs external requests to a specific internal IP address. Without it, the firewall blocks inbound connections even if the server is reachable internally.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 server's default gateway is set to the firewall's LAN IP
Why it's wrong here
This is necessary for the server to reach the internet but does not affect inbound connections from the internet.
- ✗
The firewall's NAT is disabled
- ✓
Port forwarding rules are not configured on the firewall
Why this is correct
Without port forwarding, the firewall does not know which internal device should receive incoming traffic on ports 80/443, so external requests are dropped.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
The server has a public IP address assigned
Why it's wrong here
If the server had a public IP, it would likely be accessible, but the scenario states it uses a private IP (192.168.x.x), so this is not the case.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Scenario analysis trap
If the server had a public IP, it would likely be accessible, but the scenario states it uses a private IP (192.168.x.x), so this is not the case.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Network Configuration Concepts — This question tests Network Configuration Concepts — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Port forwarding rules are not configured on the firewall — Port forwarding directs external requests to a specific internal IP address. Without it, the firewall blocks inbound connections even if the server is reachable internally.
What should I do if I get this 220-1201 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 18, 2026
This 220-1201 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 220-1201 exam.
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