Quick Answer
The answer is an SD-WAN rule. This is the correct choice because SD-WAN rules are specifically designed to match traffic based on criteria like source, destination, or port numbers, and then enforce a path selection strategy—such as manual or best quality—to steer that traffic to a preferred member, like the MPLS link. For voice traffic using UDP 16384-32768, the rule can match that port range and set the strategy to force all matching packets over the MPLS interface, while leaving other internet-bound traffic to use broadband. On the Fortinet NSE 7 Advanced Security NSE7 exam, this tests your understanding of how SD-WAN rules differ from simple static routes or policy-based routing; a common trap is confusing SD-WAN rules with firewall policies, which handle security rather than path selection. Remember the tip: "Rules route, policies protect"—if you need to force a specific traffic type over a specific link, you configure an SD-WAN rule, not a firewall policy.
This NSE7 practice question tests your understanding of advanced networking and sd-wan. 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.
An administrator wants to ensure that voice traffic (UDP 16384-32768) always uses the MPLS link, while internet-bound traffic uses broadband. Which SD-WAN feature should be configured to achieve this?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Performance SLA
Why wrong: Performance SLA measures link quality but does not direct traffic.
SD-WAN member configuration
Why wrong: Members define interfaces but not traffic steering.
Load balancing algorithm
Why wrong: Algorithms distribute load but not per specific traffic types.
SD-WAN rule
SD-WAN rules control traffic steering based on criteria.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SD-WAN rule
SD-WAN rules allow matching specific traffic patterns and forcing them to use particular members or strategies. The rule can match the voice traffic UDP port range and set the strategy to 'manual' or 'best quality' with preferred member as MPLS.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Performance SLA
Why it's wrong here
Performance SLA measures link quality but does not direct traffic.
SD-WAN member configuration
Why it's wrong here
Members define interfaces but not traffic steering.
Load balancing algorithm
Why it's wrong here
Algorithms distribute load but not per specific traffic types.
SD-WAN rule
Why this is correct
SD-WAN rules control traffic steering based on criteria.
Clue confirmation
The clue word "always" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
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.
Detailed technical explanation
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.
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
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 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 NSE7 NAT questions on configuration and troubleshooting.
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FAQ
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — Static NAT maps one inside address to one outside address..
The correct answer is: SD-WAN rule — SD-WAN rules allow matching specific traffic patterns and forcing them to use particular members or strategies. The rule can match the voice traffic UDP port range and set the strategy to 'manual' or 'best quality' with preferred member as MPLS.
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 NSE7 NAT questions on configuration and troubleshooting.
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Static NAT maps one inside address to one outside address.
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Same concept, more angles
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Variation 1. An organization is deploying SD-WAN across multiple sites with two internet links (MPLS and broadband) at the main branch. They want voice traffic to use the MPLS link unless it fails, in which case failover to broadband should occur. Which SD-WAN rule configuration achieves this?
mediumWhy C: Option C is correct because the 'best quality' strategy with a preferred member and SLA targets allows voice traffic to use the MPLS link as long as it meets the defined SLA (e.g., latency, jitter, packet loss). If the MPLS link fails or degrades below the SLA threshold, the SD-WAN rule automatically fails over to the broadband link, ensuring voice traffic continuity.
Last reviewed: Jun 21, 2026
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