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| Section | Objectives |
|---|---|
| Security and Encryption | - Encryption and certificate management - Firewall policies and security services |
| Policy-Based Routing and Traffic Steering | - Path selection and SLA-based steering - Application-aware routing policies |
| QoS and Performance Optimization | - QoS/CoS configuration - Latency, jitter, and bandwidth optimization |
| Deployment and Provisioning | - ZTP and onboarding workflows - Branch and edge deployment models |
| Monitoring, Analytics and Troubleshooting | - Versa Analytics dashboards - Troubleshooting SD-WAN performance issues |
| Versa SD-WAN Platform Components | - VOS components and CPE devices - Versa Controller, Director, Analytics roles |
| High Availability and Redundancy | - Redundant gateway and link resiliency - HA active-active and failover design |
| SD-WAN Fundamentals and Architecture | - Underlay and overlay network design - SD-WAN principles and architecture concepts |
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問題 #43
While troubleshooting the SD-WAN data path, you run show vsf tunnel access-circuits ... detail and see the following encapsulation chain: VMLH, MPLS-over-GRE, IPsec-ESP, and VXLAN. What does this output primarily confirm?
答案：A
解題說明：
The correct answer is B . Versa's SD-WAN data-path troubleshooting documentation shows that show vsf tunnel access-circuits ... detail can display the access-circuit state and encapsulation chain used for tunnel forwarding. In the example, the output lists multiple encapsulations, including VMLH , MPLS-over-GRE , IPsec-ESP , and VXLAN . It also shows transport details such as source IP, destination IP, UDP transport, tunnel MTU, SPI values, and SLA state.
This confirms that the VOS data plane has built the SD-WAN tunnel encapsulation stack required to forward overlay traffic across the underlay. IPsec-ESP in the chain indicates encrypted tunnel handling, while VXLAN and other encapsulation components are part of the SD-WAN overlay forwarding structure.
The output does not indicate simple bridging, plain-text-only GRE, or bypass of the VOS data plane.
Instead, it proves that the packet path is being processed through the VOS tunnel forwarding framework and that the administrator is looking at the SD-WAN access-circuit tunnel state.
問題 #44
Examine the exhibit below.
Which two statements correctly explain the routing shown in the exhibit. (Choose two.)
答案：C,D
解題說明：
The correct answers are A and C . The route table shown in the Versa SD-WAN design documentation includes a default route, 0.0.0.0/0 , with next hop 169.254.0.2 and exit interface tvi-0/603.0 . A default route is used when no more specific route exists in the routing table, so any unknown IPv4 unicast destination will follow that active default route through the tvi-0/603 interface. This directly supports option C.
The same design context describes local or central internet breakout, where Director workflows create TVI- based connectivity for breakout or gateway-style forwarding. In Versa SD-WAN, TVI interfaces are commonly used as internal virtual tunnel interfaces between routing instances, such as between a tenant LAN VR and a transport or breakout VR. The documentation also describes virtual TVI interface pairs being created by Director workflows between VRs for gateway routing use cases. Therefore, option A is also correct: tvi-0/603 is paired with another interface in another VR to support the default-route forwarding path.
The IP address is not shown as misconfigured; 169.254.x.x addressing is commonly used for point-to- point internal TVI links. The route is also not a blackhole route, because it has an active next hop and an exit interface.
問題 #45
A branch user reports poor throughput over an SD-WAN tunnel. The command show interfaces detail vni-0/0 shows the interface is operating at half-duplex / 100 Mbps , although the circuit is expected to run at 1 Gbps full duplex. What is the most likely cause?
答案：C
問題 #46
Which two statements are true about templates? (Choose two.)
答案：B,D
解題說明：
The correct answers are C and D . Versa templates are designed to reuse common configuration while still allowing per-device customization. Template variables allow the same template to be deployed to multiple appliances while using device-specific values such as addresses, VLAN IDs, DHCP information, or other bind-data values. Versa documentation for deploying templates describes assigning values to variables contained in a main template that are specific to the device. This makes option C correct.
Option D is also correct because Versa workflows are used to create templates for VOS device configuration.
Versa documentation states that workflows are used to create templates to configure VOS devices, and also to create templates for application steering, spoke groups, and service chains.
Option A is not correct in the normal Versa Director onboarding model because a group of devices is associated with one staging template and one post-staging template, rather than multiple device templates being stacked per appliance. Option B is also incorrect because service templates are optional reusable service-specific fragments. Versa documentation states that service templates can be used by multiple device templates and device groups, but it does not require every appliance to have one.
問題 #47
A new SD-WAN branch has completed factory-default onboarding and Versa Director has pushed the staging configuration. After reboot, the branch still tries to connect to the staging server instead of the Controller.
Which configuration item is most likely incorrect or missing in the stage-two configuration?
答案：D
解題說明：
The correct answer is A . During Versa SD-WAN onboarding, the branch uses the staging server only in the early part of the process. Versa documentation states that in Stage 1 , the branch starts an IKE session with the staging server, receives an IP address, and is informed of the Versa Director IP address. In Stage 2 , Versa Director pushes the stage-two configuration to the branch through the staging server. In this stage-two configuration, the Controller IP address is given as the remote IP address in the IPsec profile , and the branch is rebooted. After reboot, the branch should establish the IKE session with the Controller.
If the branch keeps trying to connect to the staging server after the stage-two reboot, the most likely issue is that the stage-two IPsec profile still points to the staging server or does not contain the correct Controller remote IP. Analytics, DHCP, and URL filtering settings do not determine whether the branch moves from staging-server connectivity to Controller IKE connectivity.
問題 #48
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