1.9 Explain Policy Design and Management SD-WAN-ENGINEER Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A logistics company uses SD-WAN to connect its central office to 50 distribution centers. Voice over IP (VoIP) traffic must have the highest priority, followed by the warehouse management system (WMS), with all other traffic treated as best-effort. The WAN links are 50 Mbps. The administrator wants to ensure that VoIP never experiences jitter or delay due to congestion. What is the most effective QoS configuration?

   • ACreate two QoS classes: one for VoIP and WMS combined with strict priority, and one for all other traffic
   • BCreate three QoS classes: one for VoIP with strict priority queueing, one for WMS with a guaranteed bandwidth allocation, and one for best-effort traffic with no guarantees
   • CCreate a QoS policy that marks VoIP traffic with DSCP EF and relies on the underlying network to prioritize it without configuring queues
   • DCreate a single QoS class that applies to all traffic with a 50 Mbps bandwidth limit
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the purpose of marking traffic in an SD-WAN QoS configuration?

   • ATo encrypt the traffic payload
   • BTo block unwanted traffic
   • CTo select the transport path for the traffic
   • DTo identify the traffic class for prioritization and handling
   Reveal Solution Discussion Select an answer first
4. 18expert · hard

   A global enterprise uses SD-WAN to connect 500 branch offices to two data centers. Each branch has three WAN links: MPLS, broadband, and LTE. The enterprise runs a critical ERP application that requires less than 100 ms latency and less than 0.5% packet loss. The MPLS link is the most reliable but also the most expensive. The broadband link is cheaper but has variable performance. The LTE link is a backup and has data usage limits. The network team wants to minimize MPLS usage while ensuring the ERP application always meets its performance requirements. What is the most effective policy design?

   • ASet LTE as the preferred path for ERP traffic, with a performance policy that fails over to MPLS when LTE degrades
   • BSet MPLS as the preferred path for ERP traffic, with a performance policy that fails over to broadband when MPLS degrades, and a path policy that sends all other traffic to broadband
   • CSet broadband as the preferred path for ERP traffic, with a performance policy that fails over to MPLS when broadband does not meet the latency and loss thresholds
   • DSet MPLS as the preferred path for all traffic, with no performance policies
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   When tuning a performance policy in SD-WAN, what is the purpose of setting an action for a degraded path?

   • ATo define which applications are allowed on the path
   • BTo specify the encryption algorithm for the path
   • CTo define what happens when a path fails to meet performance thresholds
   • DTo set the bandwidth limit for the path
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   In SD-WAN security policy design, what is the purpose of using zones?

   • ATo allocate bandwidth to different types of traffic
   • BTo group interfaces and define trust boundaries for traffic
   • CTo select the transport path for traffic
   • DTo define the encryption method for traffic
   Reveal Solution Discussion Select an answer first