Implementing Cisco SDWAN Solutions (ENSDWI) Free Practice Test — 30 Questions

Question 1

A multinational corporation is rolling out a Cisco SD-WAN solution across its global network. During the deployment phase, the IT operations team observes significant performance degradation and intermittent connectivity at a key manufacturing facility. Analysis of network telemetry reveals that while the underlying transport links are stable, the Software-Defined Overlay (SDO) tunnels are frequently failing to establish or maintain optimal paths during periods of high traffic volume. This is particularly impacting real-time manufacturing control systems and video conferencing for the on-site engineers. The current configuration prioritizes general data traffic, but lacks sophisticated mechanisms to dynamically adapt Quality of Service (QoS) for critical, latency-sensitive applications under fluctuating load conditions. Which strategic adjustment to the SD-WAN policy framework is most critical to resolving this issue and ensuring consistent performance for high-priority applications at this branch?

Accepted Answer

Implement dynamic QoS policies that leverage application-aware traffic classification and adaptive bandwidth allocation based on real-time link conditions and service-level agreements for critical applications.

Question 2

A global enterprise has recently implemented a Cisco SD-WAN solution to connect its geographically dispersed offices and cloud resources. Post-implementation, the network operations team is observing sporadic disruptions to critical real-time communication services, such as VoIP and video conferencing, between several branch locations and the primary data center. These disruptions correlate with reported instability on some of the underlying MPLS and internet transport links. During a troubleshooting session, the team notices that while the control plane connections between the SD-WAN edge devices and the controllers remain active, the overlay tunnels used for inter-branch communication briefly drop and then re-establish. What fundamental characteristic of the Cisco SD-WAN solution is most directly demonstrated by this behavior?

Accepted Answer

The inherent ability of the SD-WAN fabric to automatically re-establish overlay tunnels when underlying transport paths experience transient unavailability.

Question 3

A multi-site enterprise has recently migrated its WAN infrastructure to Cisco SD-WAN. During peak hours, users at several branch locations report degraded quality for Voice over IP (VoIP) calls, characterized by choppiness and dropped connections. Network monitoring reveals that during these periods, the SD-WAN fabric is intermittently steering VoIP traffic over a particular WAN transport that exhibits significantly higher latency and packet loss compared to an alternative available transport. The system, however, eventually restores acceptable call quality, implying an adaptive mechanism is at play, albeit one that is not consistently effective for this critical application. What fundamental SD-WAN behavior is most directly responsible for the observed attempts to rectify the VoIP traffic path, even if imperfectly?

Accepted Answer

Dynamic traffic steering based on application-defined Service Level Agreements (SLAs) and real-time network telemetry.

Question 4

A global enterprise has recently transitioned to a Cisco SD-WAN architecture to improve network agility and performance. Shortly after deployment, the network operations team began receiving reports of inconsistent application responsiveness between remote branch offices and the main data center. While site-to-site VPN tunnels (vTNVs) appear to establish and maintain their states without significant disruption, users are experiencing sporadic packet loss and elevated latency, particularly during peak operational hours. Initial diagnostics indicate that these performance degradations often coincide with periods when the vManage controller is actively pushing updated security policies and Quality of Service (QoS) configurations to the edge devices. The team suspects that the complexity of the applied security policies, combined with the processing demands of stateful inspection and traffic steering directives, might be overwhelming the data plane capabilities of the branch routers during high-traffic periods. Considering the distributed nature of the SD-WAN control and data planes, which underlying mechanism is most likely contributing to these intermittent performance issues?

Accepted Answer

Inefficient application of granular security policies and stateful inspection rules on the WAN edge devices, leading to data plane processing overhead during peak traffic loads.

Question 5

Consider a multinational corporation implementing a Cisco SD-WAN solution to connect its global offices. During a critical period of network upgrades and unexpected international link congestion, the IT team observes intermittent degradation in voice quality and delayed data synchronization for key financial applications across several branches. The existing SD-WAN policies are configured to prioritize real-time applications, but the observed issues suggest a more nuanced problem. Which combination of SD-WAN features, when optimally configured, would best address the dynamic nature of these performance issues and ensure consistent application experience across varying link conditions?

Accepted Answer

Application-Aware Routing (AAR) with dynamic path selection based on real-time performance metrics, coupled with granular Quality of Service (QoS) policies that classify and prioritize critical applications, and Forward Error Correction (FEC) to mitigate packet loss on less stable links.

Question 6

A global enterprise has recently migrated its network to Cisco SD-WAN, integrating both MPLS and broadband internet links for WAN connectivity. Following the deployment, the IT operations team has been receiving reports of degraded performance for real-time applications, such as Voice over IP (VoIP) and video conferencing, particularly between branch offices and the central data center. Initial diagnostics on the WAN edge devices indicate that the devices themselves are healthy, and basic connectivity tests on both the MPLS and broadband circuits show acceptable levels of packet loss and latency. However, users continue to experience choppy audio and frozen video streams intermittently. Analysis of the SD-WAN controller\'s traffic statistics reveals that while overall bandwidth utilization is within acceptable limits, the specific application flows for VoIP and video conferencing are being steered across multiple paths with varying performance characteristics, rather than consistently utilizing the path with the lowest measured jitter. What is the most probable underlying cause for this observed application performance degradation within the SD-WAN fabric?

Accepted Answer

The application-aware routing policies are not accurately configured to identify and prioritize real-time applications, leading to suboptimal path selection based on application performance metrics.

Question 7

Following the successful bootstrapping and initial policy distribution to a new vEdge device in a Cisco SD-WAN deployment, what is the most accurate description of how subsequent policy modifications are applied across the fabric, assuming the vSmart controller is the designated policy orchestrator and OMP is the established control protocol?

Accepted Answer

The vSmart controller pushes updated policy configurations via OMP to all affected vEdge routers, which then apply these changes dynamically.

Question 8

A global enterprise is initiating a broad implementation of Cisco SD-WAN across its geographically dispersed offices, which exhibit significant variations in existing network infrastructure, bandwidth availability, and local IT expertise. The project team is tasked with developing a deployment strategy that maximizes adoption efficiency while ensuring robust security and optimal performance. Which of the following deployment methodologies would best address the inherent complexities and diverse operational environments encountered in such a large-scale, heterogeneous rollout, promoting both agility and robust governance?

Accepted Answer

Phased rollout with regional customization

Question 9

Consider a scenario where a new branch office is being brought online with a Cisco SD-WAN solution. The network administrator has configured the local network infrastructure to provide DHCP services to the new WAN Edge router. To facilitate zero-touch provisioning (ZTP), the DHCP server must provide specific information to the router to enable it to discover and connect to the SD-WAN controller infrastructure. Which DHCP option is primarily utilized to convey the IP address of the Cisco vManage server, thereby initiating the automated onboarding process for the WAN Edge device into the SD-WAN fabric?

Accepted Answer

DHCP Option 150

Question 10

A global retail chain is migrating its branch offices to a Cisco SD-WAN solution to improve application performance and agility. The project timeline is aggressive, and initial deployment at a pilot site revealed unexpected latency issues with a critical SaaS application due to suboptimal path selection. The project lead needs to adjust the deployment strategy mid-stream to address this, while also ensuring that new sites coming online are not adversely affected by this change. Which behavioral competency is most critical for the project lead to demonstrate in this evolving situation to ensure successful project continuation and stakeholder confidence?

Accepted Answer

Adaptability and Flexibility

Question 11

A multinational corporation\'s SD-WAN deployment is experiencing significant degradation in real-time application performance, such as VoIP and video conferencing, between its European and North American branches. The network architects have observed that during peak hours, when the primary MPLS circuits connecting these regions become congested, the SD-WAN fabric does not effectively reroute traffic to the secondary broadband internet links, resulting in unacceptable packet loss and jitter. The current AAR policies are configured to prefer MPLS for latency-sensitive traffic but the failover mechanism appears to be too slow or not triggering under moderate congestion. Which of the following adjustments to the SD-WAN configuration would most effectively address this issue by ensuring rapid and seamless traffic rerouting based on real-time network conditions?

Accepted Answer

Implementing more aggressive application-aware routing (AAR) policies with tighter Service Level Agreement (SLA) thresholds for packet loss and latency on the preferred MPLS links, coupled with a lower delay threshold for initiating failover to the secondary broadband links.

Question 12

Anya, a network engineer, is troubleshooting a newly implemented Cisco SD-WAN solution for a multinational corporation. Users are reporting inconsistent access to critical cloud-based applications, with intermittent packet loss and latency spikes affecting voice and video conferencing. While basic site-to-site connectivity appears stable, the application performance is significantly degraded. Anya suspects that the SD-WAN overlay is not effectively steering traffic based on the underlying transport quality. What is the most critical initial step Anya should take to diagnose and resolve this performance issue?

Accepted Answer

Verify the accuracy of the Quality of Service (QoS) markings and queuing mechanisms applied to application traffic at the edge devices.

Question 13

A network engineer is troubleshooting a newly deployed branch office utilizing Cisco SD-WAN. Users report inconsistent access to critical SaaS applications hosted in the public cloud. Upon investigation, the network engineer observes that the vManage console shows the branch vEdge device as being online but frequently flapping its status, and policies intended to optimize cloud traffic are not being applied. The engineer suspects an underlying issue with the device\'s integration into the SD-WAN fabric rather than a problem with the WAN transport itself, as basic internet connectivity appears functional for non-SD-WAN traffic. Which fundamental SD-WAN control plane mechanism must be successfully established and maintained for the vEdge to receive and act upon management and policy directives from the vSmart controllers, thus enabling the optimization of cloud application performance?

Accepted Answer

The establishment of a stable DTLS tunnel between the vEdge and the vSmart controllers for control plane communication.

Question 14

Anya, a network engineer, is troubleshooting an SD-WAN deployment where users are reporting poor quality for voice and video conferencing, despite stable underlying IP connectivity. Analysis of the SD-WAN controller indicates that application identification and classification for real-time traffic are occurring as expected. However, the performance metrics for these applications consistently show high jitter and packet loss, particularly during peak usage hours. Anya suspects a gap in how the SD-WAN overlay\'s quality of service intentions are being translated and honored by the diverse transport services (e.g., MPLS and broadband internet) that comprise the WAN fabric. What specific aspect of the SD-WAN solution requires the most immediate and thorough re-evaluation to address these intermittent application performance degradations?

Accepted Answer

The end-to-end Quality of Service (QoS) policy configuration, ensuring accurate classification, marking, queuing, and shaping of real-time traffic across all transport types, and verifying that underlying transport providers honor these QoS parameters.

Question 15

Consider a scenario where a Cisco SD-WAN vEdge device loses all OMP and BFD control plane adjacencies to its designated vSmart controllers due to a widespread network outage affecting the transport links. However, the underlying data plane interfaces remain operational, and the device has previously established and learned valid TLOCs and routes. In this situation, what is the primary mechanism that enables the vEdge device to continue forwarding user traffic, albeit without dynamic policy updates or route learning?

Accepted Answer

The device utilizes its cached forwarding tables derived from the last successful control plane synchronization to maintain data plane operations.

Question 16

An SD-WAN deployment at a multinational corporation is experiencing intermittent packet loss and high latency for critical VoIP and video conferencing traffic between its European and North American branches. Anya, the lead network engineer, has determined that these issues are directly correlated with the application-aware routing (AAR) policies attempting to steer traffic based on real-time path performance. Upon deeper investigation, it\'s revealed that the AAR policies are failing to consistently select the optimal path, leading to suboptimal user experience. The underlying cause has been traced to a mismatch in how Quality of Service (QoS) is being handled across the WAN links. Specifically, the DSCP values expected by the AAR policy for prioritizing and steering specific application traffic are not being consistently recognized or preserved by the edge devices due to an oversight in the QoS configuration. What specific aspect of the QoS configuration is most likely the root cause of this application-aware routing failure?

Accepted Answer

Inconsistent DSCP marking of application traffic at the ingress of the SD-WAN edge devices, failing to align with the DSCP values specified in the application-aware routing policies.

Question 17

A network administrator observes that multiple branch sites have become unreachable within the Cisco SD-WAN overlay. Investigations reveal that BFD (Bidirectional Forwarding Detection) adjacencies between the branch vEdge routers and the central vManage system are intermittently flapping, leading to the loss of overlay tunnel establishment. This instability is preventing users at these branches from accessing critical applications hosted in the data center. What is the most effective initial troubleshooting step to restore overlay connectivity?

Accepted Answer

Verify the status of BFD sessions on the branch vEdge routers and examine the underlying transport network for any connectivity issues or packet loss between the tunnel endpoints.

Question 18

During a critical phase of a new Cisco SD-WAN deployment, Anya\'s team encounters widespread, intermittent packet loss on data plane traffic between multiple branch locations and the primary data center. The control plane appears stable, but business-critical applications are suffering. Anya needs to guide her team through a rapid resolution process, which involves re-evaluating and potentially modifying existing traffic forwarding policies and underlay routing configurations to restore full connectivity. Which of the following leadership and technical approaches best reflects the necessary skills to navigate this ambiguous and high-pressure situation, prioritizing both immediate resolution and long-term fabric stability?

Accepted Answer

Implement a phased rollback of recent policy changes, conduct detailed BFD adjacency troubleshooting, and temporarily bypass complex QoS policies to isolate the issue, while maintaining clear, frequent communication with stakeholders regarding the ongoing investigation and mitigation steps.

Question 19

A multinational corporation is deploying Cisco SD-WAN across its global network. The IT operations team is tasked with implementing a new policy to ensure high-priority, real-time collaboration traffic, such as video conferencing and VoIP, receives preferential treatment during peak business hours, even if one of the dual-homed internet breakout links experiences performance degradation. The existing infrastructure utilizes Cisco vManage for centralized control and orchestration, with edge devices at each branch. Which core SD-WAN capability, when properly configured, would enable the system to dynamically shift traffic between the two available internet links based on application performance metrics and availability to maintain optimal user experience for these critical applications?

Accepted Answer

Application-aware routing policies that dynamically steer traffic based on real-time performance metrics and application SLAs.

Question 20

A multinational corporation is experiencing significant degradation in real-time collaboration application performance across its distributed branch offices. Users report frequent call drops and audio lag, despite the underlying WAN links appearing to have sufficient bandwidth. An analysis of the SD-WAN fabric reveals that traffic for these critical applications is intermittently being routed over a lower-quality MPLS circuit when a more stable broadband link is also available. The IT team suspects an issue with how the SD-WAN fabric is making path selection decisions for these sensitive applications. Which fundamental SD-WAN mechanism, when misconfigured or inappropriately defined, would most directly lead to this observed behavior of suboptimal path selection for real-time traffic?

Accepted Answer

Inaccurate or overly stringent Service Level Agreement (SLA) definitions within Application-Aware Routing (AAR) policies, causing the system to avoid otherwise suitable paths.

Question 21

A global enterprise has deployed Cisco SD-WAN across its branch offices. A newly critical real-time data analytics application, codenamed \"Project Nightingale,\" is experiencing intermittent performance issues, manifesting as increased latency and packet loss, despite a QoS policy being configured to prioritize it. The current policy allocates a static 20% of available WAN bandwidth to \"Project Nightingale\" and directs its traffic over the most stable link based on basic link health metrics. The IT team observes that during peak hours, when other applications also experience high bandwidth utilization, \"Project Nightingale\'s\" performance degrades significantly. Which of the following adaptive policy adjustments, leveraging SD-WAN\'s advanced capabilities, would most effectively address this situation by ensuring consistent performance for \"Project Nightingale\" without manual intervention?

Accepted Answer

Implement an application-aware routing policy that dynamically steers "Project Nightingale" traffic to the optimal path based on real-time application performance metrics (latency, jitter, packet loss) and adjusts QoS parameters (priority, guaranteed bandwidth) dynamically to meet its specific Service Level Objectives (SLOs).

Question 22

A multinational financial institution is implementing a Cisco SD-WAN solution across its global branches. Given the strict regulatory environment governing financial data transmission, which strategic approach best ensures ongoing compliance with industry mandates like PCI DSS and GDPR while leveraging the benefits of SD-WAN?

Accepted Answer

Implement a robust, centrally managed security policy framework with granular logging of all traffic flows and policy changes, coupled with continuous monitoring for anomalous behavior and adherence to data privacy protocols.

Question 23

A global enterprise is rolling out a new Cisco SD-WAN fabric. Shortly after deployment, users at remote branch offices report inconsistent access to centralized applications and noticeable degradation in VoIP call quality. While basic connectivity checks confirm that VPN tunnels between branches and the data center remain operational, network monitoring reveals elevated jitter and packet loss specifically on the primary WAN links utilized by the SD-WAN solution, even when link utilization is not at its peak. The IT team has ruled out common issues like router hardware failures or basic IP connectivity problems. Which of the following investigative strategies would be most effective in diagnosing and resolving this nuanced performance problem within the SD-WAN environment?

Accepted Answer

Analyze application-aware routing policies and Quality of Service (QoS) configurations within the SD-WAN controller to identify any misalignments or suboptimal traffic steering that might be causing latency and packet loss for critical applications.

Question 24

A network administrator is deploying a new branch office, \'Branch-XYZ\', into an existing Cisco SD-WAN solution. Upon attempting to verify connectivity, it\'s noted that the WAN Edge device at Branch-XYZ is not listed in the Cisco vManage orchestrator, and no Transport Location (TLOC) identifiers associated with this branch are visible in the fabric topology. The branch site has a valid internet breakout, and basic IP reachability to the WAN Edge devices in the central hub sites has been confirmed at the transport layer. Which of the following represents the most probable root cause for the complete absence of TLOC advertisements from Branch-XYZ and its non-appearance in the orchestrator\'s inventory?

Accepted Answer

The WAN Edge device at Branch-XYZ has failed to successfully complete the initial device registration and authentication process with the SD-WAN orchestrator.

Question 25

Consider a global enterprise transitioning to a Cisco SD-WAN solution. During the initial rollout, the IT team observes a significant degradation in voice and video conferencing quality for users in remote branch offices, despite overall network connectivity being stable. Analysis of the SD-WAN overlay reveals that while the solution is successfully routing traffic, the prioritization and treatment of real-time application flows are not meeting user expectations or the organization\'s service level objectives. The project lead, recognizing the need for adaptability and problem-solving under pressure, must guide the team to rectify this situation. Which of the following actions represents the most effective and adaptive strategy to address the application performance issues and align with the principles of effective SD-WAN implementation?

Accepted Answer

Re-engineer the Quality of Service (QoS) policies to implement application-aware traffic steering and granular prioritization for latency-sensitive applications, ensuring appropriate DSCP marking and queuing mechanisms are applied across the SD-WAN fabric.

Question 26

A multinational corporation\'s recently deployed Cisco SD-WAN solution is plagued by sporadic and unpredictable connectivity disruptions between its global branch offices and the primary cloud-based data center. The IT operations team, accustomed to traditional network troubleshooting, is struggling to maintain service levels, often resorting to last-minute fixes after user complaints arise. This reactive approach has led to significant business process interruptions and a decline in user confidence. Considering the need for a more resilient and responsive network infrastructure, which strategic shift in operational methodology would most effectively address the root causes of these intermittent failures and enhance the overall stability of the SD-WAN fabric?

Accepted Answer

Implement a comprehensive, real-time network monitoring and analytics platform coupled with a formalized, data-driven root cause analysis framework for all identified anomalies.

Question 27

A multinational corporation, \"AeroDynamics,\" has recently implemented a Cisco SD-WAN solution across its global network to enhance application performance and simplify management. Following the deployment, the IT operations team has been alerted to sporadic but significant performance degradation for real-time applications, such as voice-over-IP (VoIP) and video conferencing, connecting branch offices to the central data center. Users report high latency and occasional dropped calls or distorted video feeds. Initial diagnostics confirm that the underlay transport links are stable and have sufficient bandwidth. Basic IP connectivity is functioning, and the WAN edge devices are reachable. The problem appears to be concentrated on specific traffic flows rather than a complete network outage. Which of the following control plane phenomena is the most probable underlying cause for these observed intermittent performance issues affecting real-time applications?

Accepted Answer

Unstable OMP adjacencies between vSmart controllers and affected vEdge devices, leading to inconsistent routing updates and suboptimal path selection.

Question 28

A network engineer is tasked with deploying a new Cisco vEdge router in a branch office. The router has been physically connected to the network and powered on. The vManage orchestrator has the device pre-provisioned with its serial number and a valid device certificate. The router is configured with the IP addresses of the Cisco SD-WAN controllers. Considering the foundational steps for establishing the SD-WAN overlay, what is the most immediate and critical action the new vEdge router must successfully complete to begin integrating into the existing fabric and receive its operational configuration?

Accepted Answer

Establish a secure TLS-based control connection with the Cisco SD-WAN controllers.

Question 29

A global financial institution has recently implemented a Cisco SD-WAN solution across its distributed branch network. Post-deployment, the IT operations team has observed intermittent disruptions in latency-sensitive trading application performance between several branch offices and the primary data center. Initial troubleshooting indicates that while the SD-WAN fabric is generally stable, specific application traffic streams are experiencing higher-than-acceptable packet loss and jitter, leading to transaction delays. The network architecture utilizes multiple WAN transports, including MPLS and internet broadband, with application-aware routing policies configured. Which of the following is the most probable underlying cause for this scenario, demanding a deep understanding of SD-WAN\'s integrated traffic management capabilities?

Accepted Answer

Inconsistent or improperly configured Quality of Service (QoS) policies across the SD-WAN fabric, failing to adequately prioritize and manage the latency-sensitive trading application traffic, leading to its suboptimal treatment on shared or congested links.

Question 30

A critical real-time analytics application hosted at the central data center is experiencing severe performance degradation due to an unexpected BGP session flap on the primary WAN transport link connecting a remote branch office. The SD-WAN fabric has a secondary, lower-bandwidth but stable, MPLS link available between these two locations. The network administrator must prioritize immediate service restoration for the affected application traffic. Which of the following actions represents the most effective immediate strategy to mitigate the impact and restore application functionality?

Accepted Answer

Verify the SD-WAN controller's policy configuration to ensure the secondary path is correctly prioritized for the application's QoS requirements and monitor the fabric's automated traffic rerouting to the secondary transport.

Implementing Cisco SDWAN Solutions (ENSDWI) Free Practice Test — 30 Questions

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