Configure SD-WAN to Load Balance Traffic Between Multiple WAN Links Effectively NSE4-FORTIOS-ADMINISTRATOR Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A retail company has two WAN links: a 500 Mbps fiber link and a 100 Mbps cable link. They want to maximize throughput for general internet traffic while ensuring that VoIP traffic always uses the fiber link for low latency. The SD-WAN is already configured with both links as members of a virtual SD-WAN interface. What should the administrator configure to achieve this?

   • ACreate a single SD-WAN rule for all traffic with the 'Volume' load-balance algorithm, and set the fiber link as the preferred member for VoIP using the 'priority' option.
   • BConfigure policy-based routing to send all traffic to the fiber link, and use the cable link only as a backup when the fiber link fails.
   • CSet the load-balance algorithm to 'Sessions' and enable 'link-cost' on both members, then rely on the cost values to route VoIP to the fiber link automatically.
   • DCreate an SD-WAN rule for VoIP with the fiber link as the preferred member, and a separate rule for all other traffic with a load-balance strategy that weights the fiber link higher.
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2. 7foundation · easy

   Which characteristic is a core benefit of centralized management in SD-WAN?

   • AIt requires a dedicated physical controller at each branch site.
   • BIt only works with a single internet service provider.
   • CIt allows administrators to configure and monitor all sites from a single interface.
   • DIt eliminates the need for any underlay links.
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4. 8foundation · easy

   When an SD-WAN link fails a health check, what typically happens to traffic that was using that link?

   • ATraffic is sent over the same link but with lower priority.
   • BTraffic is dropped until the link recovers.
   • CTraffic is queued and sent later when the link is back.
   • DTraffic is automatically moved to another healthy SD-WAN member.
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5. 9expert · hard

   A company uses SD-WAN with two MPLS links. They have a business-critical application that must always use the primary link, but they also want to load balance other traffic. The administrator has configured an SD-WAN rule for the critical application with the primary link as the preferred member. However, they notice that when the primary link's quality drops below the threshold, the critical application traffic is still sent over the primary link, causing performance issues. What is the most likely reason for this behavior?

   • AThe SD-WAN rule for the critical application has 'preferred' set to the primary link, but the 'fallback' option is not enabled.
   • BThe link health check is not configured for the primary link, so the SD-WAN cannot detect the quality degradation.
   • CThe routing table still points to the primary link because the SD-WAN rule is not being applied to the critical application traffic.
   • DThe SD-WAN rule for the critical application has 'set-eflow' enabled, which prevents failover based on link quality.
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6. 10foundation · easy

   Which SD-WAN load-balancing strategy would be most appropriate for traffic that is sensitive to latency, such as VoIP?

   • ASpillover load balancing to keep the primary link under a certain bandwidth threshold.
   • BStatic load balancing that always uses the first configured member.
   • CSLA-based load balancing that selects the link with the best measured latency and jitter.
   • DVolume-based load balancing to maximize throughput.
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