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【General】 SD-WAN-Engineer Latest Study Plan | Test SD-WAN-Engineer Valid

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Palo Alto Networks SD-WAN Engineer Sample Questions (Q75-Q80):NEW QUESTION # 75
When identifying devices for IoT classification purposes, which two methods does Prisma SD-WAN use to discover devices that are not directly connected to the branch ION? (Choose two.)
  • A. Syslog
  • B. CDP
  • C. LLDP
  • D. SNMP
Answer: A,D
Explanation:
Comprehensive and Detailed Explanation
Prisma SD-WAN (formerly CloudGenix) integrates with Palo Alto Networks IoT Security to provide comprehensive visibility into all devices at a branch, including those that are not directly connected to the ION device. While the ION automatically detects and classifies devices connected directly to its interfaces via traffic inspection (DPI), DHCP, and ARP analysis, gaining visibility into off-branch devices (devices connected to downstream switches or access points) requires additional discovery mechanisms that can query the network infrastructure or ingest its logs.
1. SNMP (Simple Network Management Protocol): This is the primary active discovery method for off-branch devices. The Prisma SD-WAN ION device acts as a sensor that actively polls local network switches and wireless controllers using SNMP. By querying the ARP tables and MAC address tables (Bridge MIBs) of these intermediate network devices, the ION can identify endpoints that are connected to the switch ports, even if those endpoints are not currently sending traffic through the ION. This allows the system to map the topology and discover silent or lateral-traffic-only devices.
2. Syslog: In conjunction with SNMP, the IoT Security solution can utilize Syslog messages to discover and profile devices. Network infrastructure devices (like switches and WLAN controllers) can be configured to send Syslog messages to the collection point (which enables the IoT Security service) whenever a device connects or disconnects (e.g., port up/down events, DHCP snooping logs, or 802.1x authentication logs). These logs provide real-time data about device presence and identity (MAC/IP mappings) for devices that are not directly adjacent to the ION, ensuring 100% visibility across the branch network segments. LLDP (A) and CDP (B) are typically Link Layer discovery protocols used for discovering directly connected neighbors and do not propagate beyond the immediate link, making them unsuitable for discovering devices multiple hops away or behind a switch.

NEW QUESTION # 76
When defining a Path Quality Profile (SLA) for a "Transactional" application group (e.g., Citrix, Oracle), the administrator sets the "Packet Loss" threshold to 1%.
What happens to the traffic for this application if all active paths currently exceed this 1% loss threshold?
  • A. The system selects the best available path (lowest loss) among the active paths, even if it violates the profile.
  • B. The system automatically enables a Backup path, even if the Active paths are technically "Up" but degraded.
  • C. The traffic is queued indefinitely until a path recovers.
  • D. The traffic is dropped to prevent data corruption.
Answer: A
Explanation:
Comprehensive and Detailed Explanation
This behavior describes the "Best Available Path" logic inherent in Prisma SD-WAN's availability design.
* SLA Thresholds: Path Quality Profiles act as filters to identify compliant paths.
* Total Violation: If all configured "Active" paths violate the SLA (e.g., Path A has 2% loss, Path B has
5% loss, and the threshold is 1%), the system does not drop the traffic (Option A) because maintaining connectivity is prioritized over perfect quality.
* Selection Logic: The system enters a fallback state where it compares the available active paths and selects the "Least Bad" one-the path that is closest to meeting the SLA (in this case, Path A with 2% loss).
* Backup Paths: Traffic would only move to a Backup path (Option D) if the policy explicitly configures the backup path to engage upon SLA violation of the active set. However, strictly speaking, if only active paths are considered and all fail, it picks the best of the active group rather than blackholing the traffic.

NEW QUESTION # 77
A network installer is at a remote branch site to deploy a new ION 3000 device. The device has been racked, cabled to the internet, and powered on. The installer has the "Claim Code" displayed on the email sent by the administrator.
When the administrator enters this Claim Code into the Prisma SD-WAN portal, what is the immediate status of the device before the configuration is fully pushed?
  • A. Online
  • B. Claimed
  • C. Provisioned
  • D. Active
Answer: B
Explanation:
Comprehensive and Detailed Explanation
In the Prisma SD-WAN (CloudGenix) Zero Touch Provisioning (ZTP) lifecycle, the device status transitions through specific stages that indicate its readiness and connectivity.
When an administrator enters the Claim Code (or Serial Number/Claim Code pair) into the portal, the device status immediately updates to "Claimed".
This status confirms that the portal has registered the device's unique identity and associated it with the customer's tenant. However, "Claimed" does not necessarily mean the device is fully operational or passing traffic yet. It simply signifies that the ownership is verified.
Once the physical device at the site successfully connects to the internet and reaches the Prisma SD-WAN Controller (using the call-home function), it will authenticate using its installed certificate. Upon successful authentication and the establishment of the secure control channel, the status will transition from "Claimed" to
"Online".
Only after the device is "Online" can the controller push the specific site configuration (Device Shell), policies, and IP addressing required for the device to become "Provisioned" and eventually "Active" in the data path. If the device remains in the "Claimed" state for an extended period, it indicates that the hardware has not yet successfully contacted the controller, which prompts troubleshooting of the physical internet circuit or firewall rules upstream.

NEW QUESTION # 78
When configuring a Path Policy rule for a "Real-Time Video" application, the administrator wants to ensure the traffic uses the path with the lowest packet loss.
How does the Prisma SD-WAN ION determine the "Packet Loss" metric for a given path when there is no active user traffic flowing on that link?
  • A. It defaults to a static value of 0% loss until user traffic begins.
  • B. It sends Active Probes (synthetic UDP packets) across the Secure Fabric to measure path quality continuously.
  • C. It queries the ISP's router via SNMP to retrieve interface error counters.
  • D. It relies solely on Passive Monitoring of TCP retransmissions from other user traffic on that link.
Answer: B
Explanation:
Comprehensive and Detailed Explanation
Prisma SD-WAN utilizes Link Quality Monitoring (LQM) to maintain a real-time health score for every WAN path.
To ensure the system knows the quality of a path before sending critical user traffic onto it, the ION device uses Active Probing.
Mechanism: The ION sends synthetic probe packets (typically UDP) across the Secure Fabric (VPN tunnels) and Direct Internet paths to its peers. These probes measure Latency, Jitter, and Packet Loss.
Active vs. Passive: While the system does use Passive Monitoring (observing actual user flows) when traffic is present to reduce overhead, Active Probes are essential for idle links or backup paths. Without active probing, the ION would have no data to make an intelligent steering decision for the first packet of a new video call. This ensures that "Real-Time" policies always have up-to-date metrics to select the best path immediately.

NEW QUESTION # 79
In a data center (DC) with two ION devices, all of the remote branch Prisma SD-WAN VPNs are active only on DC ION-1.
Why are no VPNs active on DC ION-2?
  • A. The ION device is behind a NAT.
  • B. The DC and branches are in a different domain.
  • C. The static route to core as a next hop is missing.
  • D. The BGP core peer is down.
Answer: D
Explanation:
Comprehensive and Detailed Explanation
In a Prisma SD-WAN Data Center deployment, the operational state of the Secure Fabric VPNs (overlay tunnels) is directly tied to the health of the BGP Core Peer configuration.4 Core Peer Dependency: DC ION devices typically peer with the data center core switch (Core Router) via BGP to learn the subnets (prefixes) for the applications hosted in the DC. The Prisma SD-WAN controller monitors this BGP peering status.5 Controller Logic: If the BGP Core Peer on a DC ION goes down (or is not established), the controller automatically marks the VPN tunnels terminating at that specific ION as "Inactive".6 This is a fail-safe mechanism designed to prevent remote branches from sending traffic to a DC ION that has lost conne7ctivity to the internal data center network (and thus the applications).
Scenario Analysis: In this scenario, DC ION-1 has active VPNs, meaning its BGP Core Peer is UP and it is successfully advertising reachability. DC ION-2 has no active VPNs, which strongly indicates that its BGP Core Peer is down.8 Because the controller sees the peer is down, it suppresses the tunnel establishment or marks existing tunnels as inactive to ensure traffic is only directed to the healthy node (ION-1).

NEW QUESTION # 80
......
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