SD-WAN Engineer Intermediate Practice Exam: Medium Difficulty 2025

A retail company is designing an SD-WAN rollout for 200 branches. Each branch has two Internet links (broadband and LTE). The business requirement is: (1) prioritize voice and video, (2) allow guest Wi-Fi to use any available link, and (3) keep critical apps reachable if one circuit fails. Which planning approach best meets these requirements with predictable behavior?

A customer wants to adopt SD-WAN but must keep existing hub-and-spoke VPN connectivity during a phased migration. Branches will be added gradually, and both legacy VPN sites and new SD-WAN sites must communicate. What architecture plan best supports this transition with minimal disruption?

A manufacturing company has three WAN transports at each site: MPLS, broadband, and LTE. MPLS is reliable but expensive and should be used primarily for ERP. Broadband should carry most SaaS traffic, and LTE should be reserved for failover and emergency access. Which SD-WAN policy strategy best aligns with these goals?

During SD-WAN deployment, a branch has two ISPs terminated on two physical interfaces. You want SD-WAN to dynamically prefer the better path for voice based on jitter and loss, while still allowing other traffic to use either link. Which configuration components are most critical to verify first?

A branch is configured for SD-WAN with broadband and LTE. Users report that video conferencing occasionally shifts to LTE even though broadband is up, causing higher cost. Monitoring shows intermittent 2–3% packet loss on broadband. The intent is: use broadband unless it violates a defined loss threshold, then fail over; return to broadband after it stabilizes. What change most directly reduces unnecessary failovers while maintaining the intent?

An enterprise wants to ensure guest Wi-Fi traffic from branches is sent directly to the Internet, while corporate traffic uses SD-WAN overlays to reach data center and other branches. Which configuration pattern best accomplishes this with clear policy boundaries?

Operations notices that several branches have inconsistent SD-WAN behavior after policy updates: some sites steer Microsoft 365 over broadband as intended, others still prefer MPLS. Configuration appears correct at the controller/management layer. What is the most likely operational cause to check next?

A network team wants to validate that their SD-WAN policies are meeting business SLAs for voice (jitter/loss) and critical apps (latency). Which operational workflow provides the most actionable validation without relying on user complaints?

After adding a new DIA circuit at multiple branches, the SD-WAN overlay comes up but some branches cannot reach certain internal prefixes over the overlay, while Internet access works. Which operational check is most likely to identify the root cause efficiently?

A company is integrating branch SD-WAN with a SASE security service for secure Internet access. The requirement is: corporate users should be steered to the SASE service for Internet-bound traffic, but local breakout must be available as a backup if the SASE path becomes unhealthy. Which design best satisfies this with SD-WAN and troubleshooting clarity?