View all questions & answers for the NSE 4 - FortiOS 7.6 Administrator Exam Materials exam
Question 16 Discussion
Comments
Selected Answers: A, B, E
Explanation:
A. They rely on session loss and jitter:
SD-WAN performance SLAs are crucial for defining acceptable performance thresholds for network links. These thresholds are often based on parameters like packet loss and jitter, ensuring that traffic is routed over the best available path based on these metrics.
B. They can be measured actively or passively:
SD-WAN performance can be monitored using both active and passive measurement techniques. Active measurements involve sending test packets to evaluate link performance, while passive measurements rely on analyzing existing traffic flows.
E. All the SLA targets can be configured:
Within an SD-WAN, you have the flexibility to define and customize the specific performance targets that matter most to your organization. This means you can tailor the SLAs to match your unique needs, including setting thresholds for latency, jitter, packet loss, and more.
Why the other options are incorrect:
C. They are applied in a SD-WAN rule lowest cost strategy:
While SD-WAN rules often use a "lowest cost" or similar strategy to determine the best path, the SLAs are used to determine if a specific path meets the required performance criteria before it is considered a viable option for the lowest cost strategy. The SLAs are a prerequisite, not part of the lowest cost calculation itself.
D. They monitor the state of the FortiGate device:
SD-WAN SLAs are focused on the performance of the network links themselves, not the internal state of the SD-WAN device (like a FortiGate). While a FortiGate might be involved in enforcing the SLA, the focus of the SLA is the network connectivity, not the device's health.
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Brave-Dumps Admin
2025-08-11 11:14:08
Dear Mohamed, A,B confirmed yes exactly but I think C & E both correct: C: as per the guide 7.6 page 426 "The performance SLA uses SLA targets with some SD-WAN rule strategies, like Lowest Cost (SLA), to decide if the link is eligible for traffic steering or not." and E looked well also, what do you think, what is the more accurate C or E? to added with A,B ?
Selected Answers: A, B, E
Selected Answers: A, B, E
Selected Answers: B, C, E
B)You can configure them actively(probes) or passively(checks traffic). Correct
C)This is true, Lowest cost strategy on a rule requires a perf SLA. Correct
D) They monitor the state of whatever you want, not only FGT. Incorrect
E) The thresholds for each target can be configured. Correct
Selected Answers: B, C, E
It question "A" said packet loss with version 7.4 , "A" was correct but now with session loss, "session" its a mistake.
Selected Answers: B, C, E
FortiGate’s SLA metrics are latency, jitter, and packet loss. There is no concept called “session loss” in the SLA configuration; if an exam option says “session loss”, it’s imprecise and should be rejected.
D (“monitor the state of the FortiGate device”) – FALSE
Performance SLAs monitor WAN path quality to a remote target, not CPU/RAM/HA or other device health.
Selected Answers: B, C, E
"FortiGate performance SLAs monitor the state of each member—whether it is alive or dead—and measures the member packet loss, latency, and jitter."
"When you configure a performance SLA, you can decide whether you want to monitor the link health actively or passively. In active monitoring, the performance SLA checks the health of the member periodically—by default every 500ms— sending probes from the member to one or two servers that act as a beacon. In passive monitoring, the performance SLA determines the health of a member based on the traffic passing through the member. "
"The SLA target section is optional. It’s where you define the performance requirements of alive members (latency, jitter, and packet loss thresholds). The performance SLA uses SLA targets with some SD-WAN rule strategies, like Lowest Cost (SLA), to decide if the link is eligible for traffic steering or not. "
Selected Answers: B, C, E
"FortiGate performance SLAs monitor the state of each member—whether it is alive or dead—and measures the member packet loss, latency, and jitter."
"When you configure a performance SLA, you can decide whether you want to monitor the link health actively or passively. In active monitoring, the performance SLA checks the health of the member periodically—by default every 500ms— sending probes from the member to one or two servers that act as a beacon. In passive monitoring, the performance SLA determines the health of a member based on the traffic passing through the member. "
"The SLA target section is optional. It’s where you define the performance requirements of alive members (latency, jitter, and packet loss thresholds). The performance SLA uses SLA targets with some SD-WAN rule strategies, like Lowest Cost (SLA), to decide if the link is eligible for traffic steering or not. "
Selected Answers: B, C, E
Selected Answers: A, B, E
Reference: Fortinet Document Library - SD-WAN Performance SLA
Performance SLAs measure link quality based on latency, jitter, and packet loss FortinetFortinet
SLA constraints include latency threshold, jitter threshold, and packet loss threshold Fortinet
URL: https://docs.fortinet.com/document/fortigate/7.6.4/administration-guide/584396/sd-wan-performance-sla
Note: The question option says "session loss" but the correct term is "packet loss" - these three metrics (latency, jitter, packet loss) are the foundation of SD-WAN performance SLAs.
B. They can be measured actively or passively.
Reference: Fortinet Document Library - Performance SLA Overview
In active mode, the FortiGate sends a packet of the type specified by the protocol setting towards the defined server Fortinet
In passive mode, session information captured by firewall policies is used to determine latency, jitter, and packet loss Fortinet
By default, active WAN health measurement is enabled when a new health check is created. It can be changed to passive or prefer passive DefenceDev
URL: https://docs.fortinet.com/document/fortigate/7.6.4/administration-guide/867342/performance-sla-overview
E. All the SLA targets can be configured.
Reference: Fortinet Document Library - Performance SLA SLA Targets
Under SLA Targets, turn on or off the required constraints, and set their values. Constraints include latency threshold (0-10000000ms), jitter threshold (0-10000000ms), and packet loss threshold (0-100%) Fortinet
SLA targets are a set of constraints that are used in SD-WAN rules to control the paths that traffic takes, including latency threshold, jitter threshold, and packet loss threshold Fortinet
URL: https://docs.fortinet.com/document/fortigate/6.2.0/cookbook/382233/performance-sla-sla-targets
Selected Answers: B, C, E
Which three statements about SD-WAN performance SLAs are true? (Choose three answers)
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