This NSE4 practice question tests your understanding of firewall policies and nat. 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.
Which address object type allows you to match traffic based on the domain name in the HTTPS SNI field?
Geography
Why wrong: Matches based on country.
Wildcard FQDN
Wildcard FQDN objects match domain names and can be used with SNI.
Subnet
Why wrong: Matches IP addresses.
FQDN
Why wrong: FQDN objects resolve to IP addresses; they do not match SNI directly.
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
Wildcard FQDN objects can match domain names (fully qualified domain names) even with wildcards, and FortiGate can use SNI to match HTTPS traffic.
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.
Geography
Why it's wrong here
Matches based on country.
Wildcard FQDN
Why this is correct
Wildcard FQDN objects match domain names and can be used with SNI.
Related concept
CIDR notation defines the prefix length.
Subnet
Why it's wrong here
Matches IP addresses.
FQDN
Why it's wrong here
FQDN objects resolve to IP addresses; they do not match SNI directly.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
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 — Wildcard FQDN objects can match domain names (fully qualified domain names) even with wildcards, and FortiGate can use SNI to match HTTPS traffic.
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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