5.3 Identify and Describe Application Performance Issues SD-WAN-ENGINEER Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A user reports that a web-based application is slow to load pages. The SD-WAN dashboard shows the link has 80 ms latency and 0% loss. Which application performance issue is most likely affecting the web application?

   • AHigh latency, because the round-trip time delays each HTTP request and response, making pages load slowly.
   • BBandwidth saturation, because the web application consumes too much bandwidth.
   • CJitter, because the variation in delay can cause the browser to wait for packets.
   • DPacket loss, because even 0% loss can cause retransmissions if the network is congested.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A branch office reports that VoIP calls are choppy and sometimes drop, while web browsing and file transfers seem unaffected. The SD-WAN dashboard shows no packet loss or jitter on the primary link, but the secondary link shows intermittent high latency. Which action should the administrator take to identify the root cause?

   • ACheck the application-specific SLA metrics for the VoIP traffic on both links, as the primary link may be carrying the traffic but violating the latency threshold.
   • BIncrease the bandwidth on the secondary link, since the secondary link is showing high latency and is likely the cause of the VoIP issues.
   • CDisable the secondary link to force all traffic onto the primary link, which has no reported issues.
   • DReboot the branch firewall to clear any temporary session table corruption that is affecting only the VoIP traffic.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A branch office uses a cloud-based CRM. Users report that the CRM is slow, especially during peak hours. The SD-WAN dashboard shows the primary link has 0% loss but jitter spikes to 30 ms during peak hours. Which application performance issue is most likely affecting the CRM?

   • ABandwidth saturation, because the CRM traffic is consuming all available bandwidth during peak hours.
   • BPacket loss, because the CRM is sensitive to any loss, even if the dashboard shows 0%.
   • CJitter, because the variable delay causes TCP retransmissions and slow application response times.
   • DLatency, because the link has high round-trip time even though jitter is the only metric shown.
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A remote site uses a file-sharing application that transfers large files. Users report that transfers are slow and sometimes time out. The SD-WAN shows the primary link has 1% packet loss and 50 ms latency. Which combination of symptoms best indicates a packet loss issue?

   • AIncreased latency and echo, because loss delays packet delivery.
   • BSlow transfer speeds and frequent timeouts, because TCP retransmits lost packets, reducing throughput.
   • CHigh jitter and out-of-order packets, because loss causes packets to arrive irregularly.
   • DIntermittent connectivity and dropped sessions, because loss causes the link to fail.
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   In an SD-WAN environment, what is the primary characteristic of latency that affects application performance?

   • AThe percentage of packets that fail to reach their destination
   • BThe variation in packet arrival times
   • CThe time it takes for a packet to travel from source to destination
   • DThe amount of data that can be transmitted per second
   Reveal Solution Discussion Select an answer first