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| Section | Objectives |
|---|---|
| Configuration and Deployment | - Network Segmentation (VLANs, Zones) - WAN Interface Configuration - Initial Setup and Provisioning |
| Policy Configuration | - Security Policy Integration - Application and Traffic Policy - QoS and Traffic Engineering |
| Monitoring and Troubleshooting | - Troubleshooting Methodology - Dashboard and Analytics - Logs and System Health |
| Prisma SD-WAN Architecture and Components | - Controllers and ION Devices - Data Center and Branch Architecture - Prisma SD-WAN Solution Overview |
>> SD-WAN-Engineer Test Engine <<
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NEW QUESTION # 73
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
NEW QUESTION # 74
An administrator is configuring a High Availability (HA) pair of ION 3000 devices at a Data Center.
Which statement accurately describes the requirement for the HA Control Interface connection between the two devices?
Answer: A
Explanation:
Comprehensive and Detailed Explanation
In a Prisma SD-WAN High Availability (HA) deployment, the HA Control Interface is the critical lifeline used to synchronize state, heartbeats, and flow information between the Active and Standby ION devices.
The strict requirement for this connection is that it must be Layer 2 adjacent.
Best Practice: A direct physical cable connection between the designated HA ports of the two devices (e.g., Port 2 on Device A to Port 2 on Device B).
Alternative: Connectivity through a switch on a dedicated, isolated VLAN is supported, provided the devices are in the same broadcast domain and subnet.
Routing (Layer 3) is not supported for the HA Control link because the keepalive mechanism relies on low-latency, multicast/broadcast-level adjacency to detect failures instantly (sub-second failover). If the HA link were routed (Option A), network latency or router convergence issues could cause "Split-Brain" scenarios where both devices assume the Active role, leading to IP conflicts and traffic loops. Option C is incorrect because the Controller is too slow to manage real-time failover; the decision must be local.
NEW QUESTION # 75
Return traffic for an application from the branch is being dropped on the branch ION. Application traffic arrives via SD-WAN internet overlay at the branch, and path policy for the application at the branch has the following settings:
Active = MPLS Overlay
Backup = Prisma Access on internet
Which branch configuration is the probable cause of this behavior?
Answer: B
Explanation:
In Prisma SD-WAN, path selection and traffic symmetry are governed by the Path Policy and the available physical/virtual circuits at a site. The scenario describes a situation where return traffic is dropped on the branch ION after arriving via an Internet overlay. To understand why, we must analyze the "Active" and
"Backup" paths defined in the policy.
The policy specifies Active = MPLS Overlay and Backup = Prisma Access on internet. In a healthy environment, the ION device expects to send and receive traffic based on these defined paths. If the site actually has two internet circuits and no MPLS circuit (Option C), a critical mismatch occurs. Because there is no MPLS circuit available to satisfy the "Active" path, the device will fall back to the "Backup" path for initiated traffic.
However, the core issue here relates to how Prisma SD-WAN handles asymmetric routing and session state.
If traffic arrives at the branch via an "Internet Overlay" path that is not explicitly defined or allowed as a valid path for that specific application in the Path Policy, the ION device's flow integrity checks may drop the packets. Specifically, if the ION is configured with only Internet circuits but the policy is looking for an MPLS overlay that doesn't exist, the device may fail to correctly associate the return packets with the session state if the paths are perceived as "unbound" or "invalid" per the policy. This behavior is a security feature designed to ensure that traffic only traverses paths that meet the administrator's defined performance and security criteria. Without an MPLS circuit present, the policy cannot be fully realized, leading to potential drops for traffic arriving on paths not intended for that specific application flow.
NEW QUESTION # 76
In the Prisma SD-WAN portal, an administrator is viewing the "Media" analytics for a branch site to troubleshoot complaints about poor voice quality.
When calculating the Mean Opinion Score (MOS) for voice traffic, which two metrics does the system prioritize active monitoring for, even when no user voice traffic is present on the link? (Choose two.)
Answer: B,D
Explanation:
Comprehensive and Detailed Explanation
Prisma SD-WAN calculates the Mean Opinion Score (MOS) to provide a standardized metric (1-5) for voice quality. To ensure the system always knows the "voice readiness" of a path-even before a call starts-it uses Active Probes (synthetic UDP packets).
While latency is measured, the MOS calculation algorithm is most heavily penalized by Packet Loss (D) and Jitter (B).
Packet Loss: Even a small amount of loss (e.g., >1%) dramatically reduces voice clarity, causing dropouts.
Jitter: High variance in packet arrival time (jitter) causes the "robotic" voice effect and buffer underruns.
The system continuously measures these specific metrics on all WAN links using synthetic probes. If the packet loss or jitter exceeds the threshold defined in the "Path Quality Profile" (e.g., Voice Profile), the path is marked as non-compliant, and the MOS score drops, triggering a policy action to move the flow. Throughput (C) is less critical for voice as calls consume very little bandwidth (e.g., 64-100 Kbps), making congestion (loss/jitter) the primary enemy, not raw speed.
NEW QUESTION # 77
Which troubleshooting action should be taken when resources at one branch site can reach the internet but cannot be reached from the data center (DC)?
Answer: D
Explanation:
In the Prisma SD-WAN architecture, reachability between sites is managed by the Control Plane, which automatically advertises prefixes across the secure fabric based on their scope. If a branch site has successful Direct Internet Access (DIA) but is invisible to the Data Center (DC), it indicates that while the local ION is online, its internal network information has not been propagated to the rest of the SD-WAN fabric.
The most common cause for this behavior is that the LAN interfaces or static routes at the branch are configured with a Local scope rather than a Global scope. When a prefix is set to "Local," the ION device treats that network as reachable only within that specific site; it will not advertise that prefix to the Controller for distribution to other ION devices, such as those at the Data Center. By ensuring the LAN branch prefixes are set to "global" (Option B), the administrator instructs the ION device to share these routes with the global fabric.
Once the prefix is marked as global, the Prisma SD-WAN Controller identifies it as a reachable destination and updates the routing tables of all peer ION devices in the same domain, including the DC gateways. This allows the Data Center to build a valid path to the branch resources over the secure VPN tunnels. Options like creating static routes (Option A) or changing site modes (Option C) do not address the fundamental requirement of prefix advertisement within the software-defined fabric, which relies on correctly defined metadata like route scope.
NEW QUESTION # 78
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