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| Section | Objectives |
|---|---|
| Topic 1: SD-WAN Fundamentals and Architecture | - SD-WAN principles and architecture concepts - Underlay and overlay network design |
| Topic 2: Deployment and Provisioning | - ZTP and onboarding workflows - Branch and edge deployment models |
| Topic 3: QoS and Performance Optimization | - Latency, jitter, and bandwidth optimization - QoS/CoS configuration |
| Topic 4: Versa SD-WAN Platform Components | - Versa Controller, Director, Analytics roles - VOS components and CPE devices |
| Topic 5: Security and Encryption | - Encryption and certificate management - Firewall policies and security services |
| Topic 6: Policy-Based Routing and Traffic Steering | - Application-aware routing policies - Path selection and SLA-based steering |
| Topic 7: Monitoring, Analytics and Troubleshooting | - Troubleshooting SD-WAN performance issues - Versa Analytics dashboards |
| Topic 8: High Availability and Redundancy | - HA active-active and failover design - Redundant gateway and link resiliency |
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NEW QUESTION # 11
A branch using DIA with CGNAT reports that new internet sessions intermittently fail. CGNAT pool counters show increasing out-of-ports errors, while out-of-address errors remain zero. What is the most likely problem?
Answer: D
Explanation:
The correct answer is A . Versa CGNAT troubleshooting documentation includes per-pool and resource counters that show allocation behavior and failures. The counters include values such as bindings allocated, bindings freed, allocation failures, out-of-address errors, and out-of-ports errors. It also shows that CGNAT source-port resources are divided and distributed to worker threads by Versa RFD/RFM, and that allocated source-port ranges can be viewed using show rfm table src-port allocated.
If out-of-ports errors increase while out-of-address errors remain zero, the pool still has usable translated IP addresses, but the available port resource for NAT bindings is exhausted. This commonly occurs when too many concurrent sessions share a limited public IP or source-port range. The corrective action would be to expand the NAT resource, add more public translated IPs, adjust port allocation, or reduce excessive session usage.
A missing NAT IP pool would more likely produce out-of-address problems. A wrong zone match might prevent translation entirely, and OSPF in the LAN VR is unrelated to CGNAT port-resource exhaustion.
NEW QUESTION # 12
A customer wants all voice sessions pinned to the DNS-resolved SaaS path selected at session creation, so the sessions are not moved mid-flow when the SaaS monitoring score changes. Which forwarding-profile behavior is most relevant?
Answer: C
Explanation:
The correct answer is A . In Versa SD-WAN application steering, SaaS or cloud-path selection can use monitoring and DNS-based behavior to determine the best path for an application. For real-time applications such as voice, session stability is often more important than aggressively moving active flows after every path- score change. Session pinning to DNS path is the forwarding-profile behavior that keeps a session associated with the path selected when the DNS/application path decision was made.
This matters because voice and collaboration applications can be sensitive to path changes, packet reordering, and jitter. Pinning prevents active sessions from being unnecessarily moved mid-flow as SaaS monitoring scores change, while still allowing new sessions to take advantage of newer path decisions.
Packet striping is used to distribute packets across multiple circuits and can create reordering concerns for some applications. Symmetric forwarding controls reverse-path behavior rather than DNS-based session stability. Random packet drop is a DoS mitigation action, not a SaaS path-selection feature.
Therefore, the best answer is Session pinning to DNS path.
NEW QUESTION # 13
A branch device is powered on with factory-default staging configuration. The device establishes an IKE session to the staging server and receives an IP address, but it does not proceed to establish an IKE session with the Versa Controller. Which staging phase is failing?
Answer: A
Explanation:
The correct answer is B . In Versa SD-WAN onboarding, the branch progresses through three staging phases.
In Stage 1 , the branch uses its factory-default configuration to start an IKE session with the staging server.
After the IKE session comes up, the staging server assigns an IP address to the branch and notifies the branch of the Versa Director IP address. Versa Director is also notified that the branch has come up.
In Stage 2 , Versa Director pushes the stage-two configuration to the branch through the staging server. This stage changes the IPsec profile so that the Controller IP address becomes the remote IP. The branch reboots and then attempts to establish the IKE session with the Controller. If the device successfully completed Stage
1 but never forms the Controller IKE session, the failure point is Stage 2.
Stage 3 is later, when the device receives stage-three configuration, becomes operational, and creates Controller IPsec plus branch-to-branch VXLAN/ESP sessions. Therefore, the described issue is a Stage
2 staging failure.
NEW QUESTION # 14
A branch device has completed Stage 3 onboarding. Which set of tunnels or sessions should exist after the device becomes fully operational in the customer SD-WAN network?
Answer: B
Explanation:
The correct answer is A . In Versa Secure SD-WAN onboarding, the branch moves through three staging phases before becoming fully operational. Versa documentation states that in Stage 3 , Versa Director pushes the stage-three configuration to the branch device over the IKE session and reboots the branch. After this stage, the branch becomes fully operational and is part of the customer SD-WAN network. At this point, IKE and IPsec sessions are created between the branch and Controller , and VXLAN and ESP sessions are created between branch to branch .
This distinction is important because the Controller connection is used for SD-WAN control-plane functions, while branch-to-branch overlay communication uses tunnel encapsulation for data forwarding. The documentation also notes that branch-to-branch ESP is maintained using a lightweight DH key-pair proprietary protocol.
Options B, C, and D are incorrect. HTTPS to Director alone does not represent the complete SD-WAN operational tunnel state. BGP to Analytics is not the required operational tunnel set. GRE-only tunnels without IPsec do not match the Versa Stage 3 SD-WAN tunnel behavior described in the staging documentation.
NEW QUESTION # 15
You are configuring the BGP routing protocol between a Versa Secure SD-WAN CPE with AS number
64514 and two upstream service providers: SP1 with AS number 64515 and SP2 with AS number 64519. You want to prefer BGP routes learned from AS 64515 over routes learned from AS 64519. Which BGP path attribute would be used to accomplish this task?
Answer: D
Explanation:
The correct answer is LOCAL_PREF . In BGP, the Local Preference attribute is used inside an autonomous system to influence which exit path is preferred for outbound traffic. In this scenario, the Versa Secure SD- WAN CPE receives routes from two upstream service providers, SP1 and SP2. To prefer routes learned from AS 64515 over routes learned from AS 64519, you would apply a BGP import or route policy that assigns a higher local preference to routes received from SP1. Versa SD-WAN design guidance shows this exact routing concept: an import policy can manipulate the Local-Pref attribute to prefer one advertised route path over another. The Versa output examples also display "Local Preference" as a BGP route attribute used in route selection.
MULTI_EXIT_DISC, or MED, is generally used to influence how a neighboring AS enters your AS, not how your CPE prefers routes learned from different upstreams. ORIGIN is part of BGP best-path selection but is not normally the administrative tool used to prefer one provider. NEXT_HOP identifies the next-hop address and does not directly define route preference.
NEW QUESTION # 16
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