The answer is to configure an SD-WAN rule with the load balancing algorithm set to 'source-dest-ip-hash'. This algorithm ensures that all packets belonging to the same session—identified by the unique combination of source and destination IP addresses—are consistently forwarded over the same ISP link, while different session pairs are distributed across both links simultaneously. On the Fortinet NSE 7 Advanced Security NSE7 exam, this tests your understanding of session-persistence versus per-packet load balancing; a common trap is confusing this with 'source-ip-hash' or 'round-robin', which would break session affinity or fail to use both links concurrently. Remember the mnemonic "SD-IP hash = Same Destination, Same Path" to recall that the hash binds a specific source-destination pair to a single interface, enabling true per-session load sharing across multiple WAN links.
NSE7 Advanced Networking and SD-WAN Practice Question
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.
A network admin needs to configure a FortiGate to load balance traffic across two ISP links using SD-WAN. The requirement is to use both links simultaneously for different sessions based on source-destination IP hash. Which two settings are required? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an SD-WAN zone with both WAN members
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create an SD-WAN zone with both WAN members
Why this is correct
Members must be added to the SD-WAN zone.
Related concept
Static NAT maps one inside address to one outside address.
✓
Configure an SD-WAN rule with load balancing algorithm 'source-dest-ip-hash'
Why this is correct
This algorithm distributes sessions based on source and destination IP hash.
Related concept
Static NAT maps one inside address to one outside address.
✗
Add a performance SLA for each member
Why it's wrong here
Performance SLA is optional; load balancing can work without it.
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.
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 NSE7 NAT questions on configuration and troubleshooting.
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create an SD-WAN zone with both WAN members
What should I do if I get this NSE7 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 NSE7 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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