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[General] Reliable SD-WAN-Engineer Exam Tutorial & Latest SD-WAN-Engineer Cram Materia

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【General】 Reliable SD-WAN-Engineer Exam Tutorial & Latest SD-WAN-Engineer Cram Materia

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Palo Alto Networks SD-WAN-Engineer Exam Syllabus Topics:
TopicDetails
Topic 1
  • Planning and Design: This domain covers SD-WAN planning fundamentals including device selection, bandwidth and licensing planning, network assessment, data center and branch configurations, security requirements, high availability, and policy design for path, security, QoS, performance, and NAT.
Topic 2
  • Unified SASE: This domain covers Prisma SD-WAN integration with Prisma Access, ADEM configuration, IoT connectivity via Device-ID, Cloud Identity Engine integration, and User
  • Group-based policy implementation.
Topic 3
  • Operations and Monitoring: This domain addresses monitoring device statistics, controller events, alerts, WAN Clarity reports, real-time network visibility tools, and SASE-related event management.
Topic 4
  • Troubleshooting: This domain focuses on resolving connectivity, routing, forwarding, application performance, and policy issues using co-pilot data analysis and analytics for network optimization and reporting.
Topic 5
  • Deployment and Configuration: This domain focuses on Prisma SD-WAN deployment procedures, site-specific settings, configuration templates for different locations, routing protocol tuning, and VRF implementation for network segmentation.

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Palo Alto Networks SD-WAN Engineer Sample Questions (Q38-Q43):NEW QUESTION # 38
An administrator has configured a Path Policy for "ERP_Traffic". The policy allows two public internet links,
"ISP-A" and "ISP-B", both marked as "Active". The Path Quality Profile (SLA) requires a latency of less than
150ms. Currently, both ISP-A and ISP-B have a latency of 40ms, well within the SLA.
How does the Prisma SD-WAN ION determine which link to use for a new flow of "ERP_Traffic" when both active paths meet the SLA requirements?
  • A. It selects the path that appears first in the interface configuration list.
  • B. It duplicates the packets across both paths (Packet Duplication) to ensure delivery.
  • C. It selects the path with the highest available bandwidth capacity.
  • D. It selects the path with the lowest numerical latency (e.g., if ISP-A drops to 39ms).
Answer: C
Explanation:
Comprehensive and Detailed Explanation
Prisma SD-WAN utilizes a sophisticated decision engine for Application-Based Path Selection that goes beyond simple failover. When configuring a Path Policy, the administrator defines "Active" paths and a "Path Quality Profile" (SLA).
* SLA Compliance (The Filter): First, the system filters the available paths based on the Path Quality Profile. In this scenario, both ISP-A and ISP-B have 40ms latency against a 150ms threshold. Both are
"green" or compliant paths.
* Selection Criteria (The Tie-Breaker): When multiple paths are configured as "Active" and all meet the performance SLA, the ION device aims to optimize the overall user experience and network utilization. The default behavior for load balancing across healthy, compliant active paths is to select the path with the highest available bandwidth capacity.
By steering new flows to the link with the most "headroom" (available Mbps), the system prevents the saturation of a smaller link (e.g., a 20Mbps DSL line) while a larger link (e.g., 1Gbps Fiber) sits underutilized.
This maximizes the aggregate throughput for the site. While latency is the qualifier, bandwidth availability is often the selector for compliant paths. Note that if the application was defined as "Real-Time" and configured for packet duplication, behavior would differ, but for standard traffic, capacity-based distribution is the standard active/active logic.

NEW QUESTION # 39
An organization has provided the following technical requirements and details:
* High availability (HA) at all data center and branch locations
* Two geographically separate main data center locations
* One small data center location that contains local users and applications requiring policies
* 50 branch locations
* ISP capacities for all branch locations but no accurate measurement of the actual bandwidth consumption Based on Palo Alto Networks best practices and recommendations, which two licensing options will meet the customer objectives? (Choose two.)
  • A. Six data center subscriptions
  • B. Branch subscription per site
  • C. Aggregate bandwidth subscription
  • D. Four data center subscriptions
Answer: A,C
Explanation:
Prisma SD-WAN licensing is structured to provide flexibility while ensuring that all components of the secure fabric are correctly accounted for. To meet the requirements of this organization, we must calculate the necessary subscriptions for both the data center hubs and the distributed branch network.
First, we address the Data Center Subscriptions. The organization has two main geographically separate data centers and one small data center, all of which require High Availability (HA). In a Prisma SD-WAN deployment, HA at a site is achieved by deploying two ION devices in a cluster. Palo Alto Networks licensing requires a separate Data Center subscription for each ION device acting as a hub. Therefore, with three data center locations (2 main + 1 small) each requiring an HA pair (2 devices per site), a total of six data center subscriptions (Option A) are required to license all six hub appliances.
Second, we address the Branch Subscriptions. The organization has 50 branches but lacks accurate measurements of actual bandwidth consumption. Palo Alto Networks' best practice for such scenarios is the Aggregate Bandwidth Subscription model (Option B). Instead of purchasing a fixed "Branch subscription per site" (Option D)-which requires knowing the exact throughput needs for every individual location-the aggregate model allows the customer to purchase a total pool of bandwidth (e.g., 5 Gbps) that is shared across all 50 branch sites.
This "pay-as-you-grow" approach is ideal when consumption patterns are unknown or inconsistent. As branches utilize the bandwidth, it is deducted from the central pool. This avoids the risk of over-provisioning licenses at low-usage sites or under-provisioning at high-usage sites. Together, the six DC subscriptions and the aggregate bandwidth pool provide a fully licensed, HA-capable SD-WAN environment that aligns with Palo Alto Networks' scaling recommendations.

NEW QUESTION # 40
In the Prisma SD-WAN portal, the Application Health dashboard assigns a color-coded "Health Score" (Green, Yellow, Red) to applications.
Which three metrics are combined to calculate this composite AppX (Application Experience) score? (Choose three.)
  • A. Server Response Time (SRT)
  • B. Bandwidth Utilization
  • C. Network Transfer Time (NTT)
  • D. Transaction Failure Rate
  • E. Jitter
Answer: A,C,D
Explanation:
Comprehensive and Detailed Explanation
The AppX (Application Experience) score is a proprietary metric used by Prisma SD-WAN to provide a holistic view of user experience, rather than just network statistics. It is calculated based on three key components:
* Transaction Failure Rate (A): The percentage of application transactions that failed (e.g., TCP resets, HTTP 500 errors). This indicates availability.
* Network Transfer Time (B): The time taken for packets to traverse the network (WAN/LAN latency).
This indicates network health.
* Server Response Time (C): The time taken by the application server to respond to a request. This indicates backend performance.
Why not D or E?
* Bandwidth Utilization (D) is a capacity metric, not a direct measure of quality. A link can be 90% full but still deliver packets quickly (good AppX), or 10% full but dropping packets (bad AppX).
* Jitter (E) is a network-layer metric primarily relevant for UDP Real-Time media. While important, the high-level "AppX" score for general TCP apps focuses on the "Time-to-Glass" metrics (NTT/SRT) and success rates.

NEW QUESTION # 41
A network engineer is troubleshooting a user complaint regarding "slow application performance" for an internal web application. While viewing the Flow Browser in the Prisma SD-WAN portal, the engineer notices that the Server Response Time (SRT) is consistently high (over 500ms), while the Network Transfer Time (NTT) and Round Trip Time (RTT) are low (under 50ms).
What does this data indicate about the root cause of the issue?
  • A. The issue is likely on the application server itself (e.g., high CPU, slow database query), not the network.
  • B. The issue is likely caused by congestion on the WAN circuit, requiring a QoS policy adjustment.
  • C. The issue is caused by a high packet loss rate on the internet path.
  • D. The issue is due to a misconfigured DNS server at the branch.
Answer: A
Explanation:
Comprehensive and Detailed Explanation
The Flow Browser and App Response Time metrics in Prisma SD-WAN are critical tools for isolating the fault domain-determining whether a problem lies in the "Network" or the "Application."
* Network Transfer Time (NTT) / Round Trip Time (RTT): These metrics measure the time it takes for packets to traverse the network (WAN/LAN) and for acknowledgments to return. A low NTT (e.g.,
<50ms) confirms that the network pipes (SD-WAN overlay, Underlay circuits) are healthy and transporting packets quickly.
* Server Response Time (SRT): This metric specifically measures the time between the server receiving a request and the server sending the first byte of the response. It essentially measures the "processing time" of the backend server.
In the scenario described, the network metrics (NTT/RTT) are excellent, effectively ruling out WAN congestion, packet loss, or latency (Option A and C). However, the Server Response Time (SRT) is very high (500ms). This signature is a definitive indicator that the network delivered the request instantly, but the application server took a long time to process it. This points the troubleshooting effort toward the server infrastructure (e.g., a slow SQL query, an overloaded web server, or lack of compute resources) rather than the SD-WAN environment.

NEW QUESTION # 42
Which specialized hardware feature is available on the ION 9000 series but NOT on the ION 3000 series, making it suitable for high-throughput Data Center deployments?
  • A. PoE+ (Power over Ethernet) output ports
  • B. Fail-to-Wire Bypass Pairs
  • C. 10 Gigabit Ethernet (SFP+) ports
  • D. Support for LTE/5G SIM cards
Answer: C
Explanation:
Comprehensive and Detailed Explanation
The ION 9000 is the flagship high-performance hardware model designed for large Data Centers and Campus Cores.
10GbE Connectivity (C): The defining hardware differentiator for the ION 9000 is its inclusion of multiple 10 Gigabit Ethernet (SFP+) interfaces. This allows it to interconnect with Data Center core switches at 10Gbps speeds, supporting the multi-gigabit aggregate throughput required for hub sites aggregating traffic from hundreds of branches.
ION 3000: The ION 3000 is a branch-tier device limited to 1 Gigabit Ethernet (copper/SFP) interfaces.
Bypass Pairs (B): Both models (and others like ION 2000/7000) support Bypass Pairs.
LTE/PoE (A/D): These are typically features of smaller branch/edge models (like ION 1200), not the high-end DC concentrators.

NEW QUESTION # 43
......
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