Quick Answer
The answer is the Wildcard FQDN address object. This is the correct choice because a Wildcard FQDN object is specifically designed to match traffic based on domain name patterns, such as *.example.com, where the asterisk represents any subdomain. Unlike standard FQDN objects that require an exact domain match, the wildcard variant allows for flexible, pattern-based matching against the full domain hierarchy, making it ideal for policies that need to cover multiple subdomains under a parent domain. On the Fortinet NSE 4 exam, this concept tests your understanding of how FortiGate categorizes and matches traffic by destination domain rather than IP address, often appearing in scenarios involving cloud services or content filtering. A common trap is confusing Wildcard FQDN with standard FQDN or IP-based address objects; remember that if the requirement includes a wildcard character like an asterisk, you must use the Wildcard FQDN type. For a quick memory tip, think “Wildcard for wild domains”—the asterisk is your clue to choose the Wildcard FQDN object.
This NSE4 practice question tests your understanding of firewall policies and nat. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 FortiGate administrator wants to create a firewall policy that matches traffic based on the destination domain name (e.g., *.example.com). Which type of address object should be used?
FQDN object
Why wrong: FQDN resolves to a single IP; does not support wildcard patterns.
Wildcard FQDN object
Wildcard FQDN supports patterns like *.example.com.
Subnet object
Why wrong: Subnet objects do not support domain names.
Geography object
Why wrong: Geography objects match by country.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Wildcard FQDN object
Wildcard FQDN objects allow matching based on domain name patterns like *.example.com. Option D is correct.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
FQDN object
Why it's wrong here
FQDN resolves to a single IP; does not support wildcard patterns.
Wildcard FQDN object
Why this is correct
Wildcard FQDN supports patterns like *.example.com.
Related concept
CIDR notation defines the prefix length.
Subnet object
Why it's wrong here
Subnet objects do not support domain names.
Geography object
Why it's wrong here
Geography objects match by country.
Common exam traps
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
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
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related NSE4 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Firewall Policies and NAT — This question tests Firewall Policies and NAT — CIDR notation defines the prefix length..
The correct answer is: Wildcard FQDN object — Wildcard FQDN objects allow matching based on domain name patterns like *.example.com. Option D is correct.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related NSE4 subnetting questions on CIDR, address ranges, and subnet selection.
CIDR notation defines the prefix length.
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Last reviewed: Jun 21, 2026
This NSE4 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 NSE4 exam.
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