Question 670
A FortiOS 7.6 team examines: A low-cost ISP becomes lossy and the routing decision must prefer a reliable but higher-cost member. Select TWO complementary choices: the most appropriate corrective action AND the specific evidence confirming success.
Explanation
Correct Answers
For the observed situation (A low-cost ISP becomes lossy and the routing decision must prefer a reliable but higher-cost member), the most specific acceptance evidence is: Tested sessions use the lowest-cost eligible path when it meets requirements and move when it fails the SLA. It validates the recommended response: Use the appropriate supported lowest-cost or best-quality SD-WAN selection strategy based on accepted SLA thresholds and business economics. This addresses the documented risk: Choosing solely by cost without an acceptable SLA can degrade services, while ignoring price can waste expensive WAN capacity.
The reported FortiOS 7.6 condition is: A low-cost ISP becomes lossy and the routing decision must prefer a reliable but higher-cost member. The targeted administrative response is: Use the appropriate supported lowest-cost or best-quality SD-WAN selection strategy based on accepted SLA thresholds and business economics. The relevant failure risk is: Choosing solely by cost without an acceptable SLA can degrade services, while ignoring price can waste expensive WAN capacity. Validate with: Tested sessions use the lowest-cost eligible path when it meets requirements and move when it fails the SLA.
Incorrect Answers
Static route distance and priority (4.1) would demonstrate or implement: Route-table inspection and a controlled primary-path test confirm expected route preference and backup behavior. This choice can be useful for that problem, but it does not establish the Sd-wan lowest-cost versus measured quality control being assessed here.
Static route next-hop reachability (4.1) addresses another technical failure: A route to an unreachable next hop can blackhole permitted packets even when its configuration appears syntactically valid. This case instead tests Sd-wan lowest-cost versus measured quality; the choice measures or changes another part of the system.
Routing versus firewall policy separation (4.1) would demonstrate or implement: A successful route lookup does not itself authorize a packet, and an allow rule does not create a missing return route. The paired-answer requirement concerns Sd-wan lowest-cost versus measured quality; this alternative does not provide the matching intervention and separate acceptance evidence.