SD-WAN-Engineer Exam Dumps - Paloalto Networks Network Security Administrator Questions and Answers

Comprehensive and Detailed Explanation

According to thePrisma SD-WAN Performance Policy Default Behaviordocumentation, the default action configured for applications (including real-time media) when a path experiences poor performance (violates the SLA thresholds for latency, jitter, or packet loss) is toMove Flows.

The Prisma SD-WAN ION device continuously monitors the health of all available paths. If the active path for a media application degrades and fails to meet the specified SLA, the default policy dictates that the traffic should be steered (moved) to an alternate, compliant path that meets the performance criteria.

WhileForward Error Correction (FEC)is a powerful feature available in Prisma SD-WAN to mitigate packet loss for real-time applications, it is anoptional actionthat must be explicitly enabled or configured within the performance policy rules. It is not thedefaultaction in the base system configuration; the primary default mechanism for handling performance issues is to leverage the multi-path fabric to switch to a better link.

Comprehensive and Detailed Explanation

Site Templates(often referred to as Site Configuration Templates) are a critical tool for the Zero Touch Provisioning (ZTP) of large-scale deployments in Prisma SD-WAN.

1. Device Pre-staging (Statement C):

One of the primary capabilities of Site Templates is the creation of Device Shells. A device shell is a configuration container that exists in the controller before the physical hardware is installed or connected. By using a template, an administrator can pre-provision the entire configuration (interfaces, routing, subnets) for the "Site" and "Element" (Device). When the physical ION device is later connected to the internet and claimed (associated with the shell via its Serial Number), it immediately inherits this pre-staged configuration, enabling a true "plug-and-play" deployment.

2. Mandatory Variables (Statement B):

To successfully instantiate a functional site from a generic template, specific unique identifiers are required in the variable data set (typically a CSV file).

Site Name:Identifies the location in the portal.

ION Software Version:Ensures the device boots to the specific validated code version required for the deployment, preventing inconsistencies.

ION Serial Number / Device Name:Required to bind the logical configuration (Shell) to the physical hardware. Even if the serial is added later during the claim process, thestructureof the template and the deployment workflow mandates these variables to ensure the device can be uniquely identified and managed within the fabric.

Note on Option D:While it is technically possible to re-deploy a template, theBest Practicefor "Day 2" operations (updating or modifying configuration after deployment) is to usePrisma SD-WAN Stacks(Network Stacks, Security Stacks, etc.). Stacks allow for granular, policy-based updates across multiple sites without the destructive or rigid nature of re-applying a full site initialization template. Therefore, D is not the aligned best practice.

Comprehensive and Detailed Explanation

In Prisma SD-WAN (CloudGenix),Path Policiescontrol how application traffic is steered across WAN links. To ensure that traffic is automatically shifted from a saturated circuit to another circuit with available bandwidth, both circuits must be configured asActive Pathswithin the policy rule.

When multiple paths are designated as "Active," the ION device treats them as a shared pool of available resources. The system continuously monitors the bandwidth utilization (capacity) and health (latency, jitter, loss) of all active links. If "Circuit A" (500 Mbps) becomes saturated or approaches its defined bandwidth limit, the ION's intelligent scheduler will automatically direct new application flows to "Circuit B" (100 Mbps) because it is a valid, healthy Active path with available capacity. This achieves effective load balancing and bandwidth aggregation.

In contrast, configuring "Circuit B" as aBackup Path(Option A or B) creates a strict priority relationship. Traffic would only move to the Backup path if the Active path completely failed or violated its configured SLA (Path Quality Profile) significantly enough to be considered "down." Mere bandwidth saturation might not trigger an SLA failure immediately, potentially leading to dropped packets on the saturated link while the backup link remains idle. Therefore, placingBoth circuits under active pathis the correct configuration for dynamic capacity management.

Comprehensive and Detailed Explanation

In the Prisma SD-WAN Data Center (DC) model, the terminology for BGP peers defines their role in the topology and how the system generates route maps.

Core Peer:This peer type is designated for theLAN-sideconnection (facing the DC Core Switch or internal Routers). Its primary purpose is tolearnthe subnets/prefixes hosted in the data center so the ION can advertise them to the remote branches. The system automatically creates route maps to facilitate this redistribution into the fabric.

Edge Peer:This peer type is designated for theWAN-sideconnection (facing the Edge Router or MPLS PE). Its primary purpose is to provide reachability to the underlay network.

Distinction:Selecting the correct type affects the defaultRoute MapsandPrefix Listsgenerated by the controller. Configuring a Core Peer correctly ensures that the DC's internal subnets are properly learned and propagated to the overlay, whereas an Edge Peer configuration focuses on WAN next-hop reachability.

Comprehensive and Detailed Explanation

To achieve strict regional isolation where branch sites only form VPN tunnels with Data Centers in their specific region (e.g., EU branches to EU DCs only), the correct architectural feature to utilize isVPN Clusters.

In Prisma SD-WAN (CloudGenix), aClusterdefines a logical security and topology boundary for the overlay network. By default, devices may be placed in a "Default" cluster where they attempt to form a mesh or hub-and-spoke topology with all other reachable devices in that context.

To enforce the new policy:

Logical Partitioning:The administrator should create separate VPN Clusters for each region (e.g., "Cluster-NA", "Cluster-EU", "Cluster-Asia").

Assignment:The Regional Data Center IONs and their corresponding Branch IONs must be moved into their respective clusters.

Result:The Prisma SD-WAN controller dictates that devices can only establish Secure Fabric (VPN) tunnels with other devices within thesame cluster. This effectively segments the global network, ensuring that an Asian branch never attempts to build a tunnel to a North American DC, satisfying the compliance requirement without complex access lists or manual tunnel configuration.

Option B (Manual Tunnels)is administratively unscalable and negates the benefits of SD-WAN automation.

Option C (Circuit Labels)is primarily for path selection and traffic steering, not for hard topology segmentation.

Option D (VRFs)is used for local Layer 3 segmentation (routing isolation) within a device, not for controlling WAN overlay tunnel formation scope.