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| Section | Objectives |
|---|---|
| Prisma SD-WAN Architecture and Components | - Controllers and ION Devices - Data Center and Branch Architecture - Prisma SD-WAN Solution Overview |
| Policy Configuration | - Security Policy Integration - QoS and Traffic Engineering - Application and Traffic Policy |
| Configuration and Deployment | - Network Segmentation (VLANs, Zones) - Initial Setup and Provisioning - WAN Interface Configuration |
| Monitoring and Troubleshooting | - Logs and System Health - Troubleshooting Methodology - Dashboard and Analytics |
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NEW QUESTION # 48
When an ION device has been claimed, the cloud-based controller generates and communicates with the device by which method?
Answer: A
Explanation:
In the Prisma SD-WAN (formerly CloudGenix) architecture, the security and authenticity of device-to- controller communication are paramount. When a new ION (Instant-On Network) device is powered on and connected to the internet, it initiates a secure "phone home" process to the Prisma SD-WAN Cloud Controller.
To ensure that the controller is communicating with a genuine Palo Alto Networks hardware or software instance, the system utilizes a Manufacturer Installed Certificate (MIC).
The MIC is a unique digital certificate burned into the hardware's Trusted Platform Module (TPM) or secure storage during the manufacturing process. This certificate acts as the device's foundational identity. When a customer "claims" a device in the Prisma SD-WAN portal using its serial number, the controller maps that serial number to the specific MIC associated with that unit.
Once the device is claimed and attempts to connect, a mutual TLS (mTLS) handshake occurs. The ION device presents its MIC to the controller to prove its identity, and the controller validates this against its records. This method eliminates the need for manual staging, pre-configuration, or the complexity of managing a Customer Installed Certificate (CIC) or a private Public Key Infrastructure (PKI) during the initial deployment phase. By leveraging the MIC, Prisma SD-WAN achieves true Zero Touch Provisioning (ZTP), ensuring that only authorized, authentic devices can join the fabric and receive configuration policies, thereby maintaining a secure and automated onboarding workflow.
NEW QUESTION # 49
A network engineer is troubleshooting a "Voice Quality" issue. They suspect that the DSCP markings are being stripped or altered by the ISP.
Which tool in the Prisma SD-WAN portal allows the engineer to capture live packets on the WAN interface and inspect the IP header ToS/DSCP field?
Answer: C
Explanation:
Comprehensive and Detailed Explanation
To validate specific packet-level details like DSCP (Differentiated Services Code Point) values, header checksums, or exact payload sizes, a Packet Capture (PCAP) is required.
PCAP Tool: Prisma SD-WAN provides a built-in PCAP utility accessible directly from the portal. The engineer can select the specific Interface (e.g., Internet 1), apply a Filter (e.g., port 5060 or host 1.2.3.4), and capture the traffic.
Analysis: The resulting .pcap file can be downloaded and opened in Wireshark. This allows the engineer to definitively see if the packets leaving the ION have DSCP EF (46) and if the packets arriving (if capturing on the other side) still retain that marking, or if the ISP has bleached it to CS0 (0).
Flow Browser (A): While it shows "Application" and metrics, the Flow Browser typically displays the assigned priority class, not necessarily the raw bit-level DSCP value present in the packet header on the wire.
NEW QUESTION # 50
When integrating Prisma SD-WAN with Prisma Access, what is the specific role of the Service Connection (SC)?
Answer: D
Explanation:
Comprehensive and Detailed Explanation
In the Prisma Access architecture (integrated with SD-WAN), distinct connection types serve different purposes.
Remote Networks: These are the connections from your Branch sites (using ION devices) into the cloud. They allow branches to get to the internet or other branches.
Service Connections (SC): This is a specialized high-bandwidth connection used to bridge the Prisma Access Cloud to your Private Data Center or Headquarters.
The primary use case for a Service Connection (Option A) is to allow mobile users and branch users (who are connected to the Prisma cloud) to reach private, centralized resources that still reside on-premise, such as Active Directory controllers, legacy databases, or mainframes. Without a Service Connection, users in the cloud would be able to reach the internet and each other, but not the servers physically located in your HQ data center. The CloudBlade automates the creation of these tunnels, but architecturally, the "Service Connection" is the "cloud-to-HQ" bridge.
NEW QUESTION # 51
What are two potential causes when a secondary public circuit has been added to the branch site, but the Prisma SD-WAN tunnel is not forming to the data center? (Choose two.)
Answer: A,C
Explanation:
In a Prisma SD-WAN deployment, the formation of VPN tunnels between a branch ION device and a Data Center (DC) ION is governed by specific configuration parameters that define how an interface interacts with the WAN fabric. When a secondary public circuit is introduced, the system requires precise classification to initiate the negotiation of security associations.
The first critical factor is the Interface Role. For an ION device to attempt to build a global fabric tunnel over a public circuit, the interface must be explicitly assigned the "Internet" role. If the role is incorrectly set (e.g., as "LAN" or left unconfigured), the device will not treat that physical port as a viable path for the SD- WAN overlay, preventing the tunnel from initiating.
Secondly, the Circuit Label plays a vital role in the path selection and tunnel orchestration logic. Prisma SD- WAN uses labels to match local branch circuits with corresponding circuits at the data center or other branches. If a circuit label is missing or mismatched on the interface configuration, the Controller cannot properly orchestrate the "bind" between the branch and the hub. Without a valid label, the ION device doesn't know which path group the circuit belongs to, and consequently, the automated tunnel signaling process fails to complete.
While DNS is important for management connectivity to the Controller, it is generally not the primary blocker for site-to-site tunnel formation if the Controller reachability is already established via the primary circuit.
Similarly, "Interface Scope" is more relevant to routing advertisement rather than the foundational establishment of the SD-WAN tunnel itself. Therefore, ensuring the Internet role and Circuit Label are correctly applied is the standard troubleshooting step for non-forming tunnels on new circuits.
NEW QUESTION # 52
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?
Answer: D
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 # 53
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