VNX301熱門認證 - VNX301在線題庫

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Versa Networks VNX301 考試大綱：

主題簡介
主題 1
  • Versa SD-WAN Services: Covers the WAN services delivered through Versa's platform, including application steering, traffic policies, SLA monitoring, and link aggregation.
主題 2
  • Versa Secure SD-WAN Infrastructure: Focuses on the core components and architecture of Versa's SD-WAN platform, including controllers, directors, and secure connectivity between sites.
主題 3
  • Underlay
  • Overlay Technologies: Covers the foundational transport networks (underlay) and the virtual networks built on top of them (overlay), including tunneling protocols used in SD-WAN deployments.
主題 4
  • SD-WAN Network Topologies and Routing Concepts: Examines the various deployment topologies such as hub-and-spoke or full-mesh, along with routing protocols and path selection mechanisms used across the WAN.
主題 5
  • Configuration and Provisioning: Covers how to deploy, configure, and onboard SD-WAN devices and services using Versa Director, including templates and zero-touch provisioning workflows.
主題 6
  • Versa Security Services: Addresses the integrated security capabilities within Versa SD-WAN, such as next-generation firewall, IPS
  • IDS, URL filtering, and segmentation.

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VNX301在線題庫，VNX301熱門考古題

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最新的 Administrator SD-WAN Specialist VNX301 免費考試真題 (Q14-Q19):

問題 #14
A branch device is stuck after staging. The Controller does not show the expected branch lifecycle notification. Which statement best describes the role of MP-BGP in the provider organization for this process?

答案：B


問題 #15
Examine the exhibit below.
Spoke1 and Spoke2 are part of Spoke-to-Hub-Only spoke group, the hub is advertising a default route to both the spokes.
Referring to the exhibit, which statement is true?

答案：D

解題說明：
In Versa SD-WAN, a Spoke-to-Hub-Only topology is specifically designed for deployments where spoke branches communicate only with hub resources and not with other spokes. Versa's SD-WAN design documentation states that in a spoke-to-hub-only topology, the default behavior is that only hub routes are advertised, and spoke routes are not re-advertised by the hub branch. It also explains that this topology is used when spokes do not have to communicate with each other.
Even though the hub in the exhibit advertises a default route, that does not change the topology behavior into spoke-to-spoke communication. The default route can attract unknown traffic from the spokes toward the hub, but the Spoke-to-Hub-Only policy prevents the spoke prefixes from being redistributed or imported in a way that allows spoke-to-spoke reachability. Versa documentation further shows that spoke routes are filtered using BGP communities and import policies, and that the spoke route table contains only destinations behind the hubs, not other spoke routes.


問題 #16
A branch has correct underlay speed and no asymmetric SD-WAN paths, but users still report packet loss during large transfers. You suspect QoS shaping is dropping traffic. Which command is most appropriate to verify interface-level CoS drops?

答案：A

解題說明：
The correct answer is A . Versa throughput troubleshooting documentation includes a specific section titled Check that Packets Are not Dropped by CoS . It states that if a CoS shaper or rate limiter is configured on the VOS device, it may drop packets when traffic exceeds the configured shaping rate. To check whether CoS is dropping packets, Versa recommends commands including show class-of-services interfaces brief and show class-of-services interfaces detail interface-name.
The detailed interface output displays traffic statistics such as TX packets, TX packets dropped, TX bytes, TX bytes dropped, and per-traffic-class drops. This is exactly the evidence needed to confirm whether shaping or QoS enforcement is causing the observed loss.
show alarms last-n 10 may reveal major events but will not provide per-interface CoS drop counters.
show system uptime only indicates how long the system has been running. show cgnat tenants is relevant for NAT state and tenant CGNAT resources, not QoS drops.


問題 #17
You want to ensure that devices in your branch sites cannot source traffic from IP addresses that are not assigned to the branch sites. What will solve this problem?

答案：D

解題說明：
The correct answer is B . The requirement is to stop branch devices from sourcing traffic using IP addresses that do not belong to the branch. This is a source-address enforcement problem, so the correct control is a stateful firewall policy that permits only traffic whose source IP address matches the valid branch LAN prefix or branch-assigned address range. Versa's stateful firewall configuration documentation explains that firewall policy rules include source matching, where the administrator selects the source zone and one or more source addresses to which the rule applies.
By creating an allow rule for the legitimate branch source prefixes and placing a deny rule for all other sources from the branch LAN zone, the VOS device prevents spoofed or unauthorized source addresses from leaving the branch. This is consistent with Versa security policy behavior, where firewall rules evaluate traffic based on zones, addresses, services, applications, and other match criteria. Captive portal verifies user identity but does not directly prevent IP spoofing. An IP filter profile based on applications does not ensure the source address belongs to the branch. Option D is incorrect because allowing traffic to the assigned LAN range controls destination traffic, while this requirement is about validating the source IP address of outbound branch traffic.


問題 #18
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?

答案：C

解題說明：
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.


問題 #19
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