VNX100 Sample Questions Answers

In the exhibit shown, the gear icon next to the VLAN setting in a template workflow indicates a place where you can input variable data for each device that shares this template. The gear icon typically represents settings that are customizable for each individual deployment. Therefore, you would select the gear icon for a VLAN in a template workflow when each device requires a unique VLAN configuration on the vni-0/1 interface. This allows for the VLAN ID to be specified per device when the template is applied, accommodating the requirement that each device may be connected to a different VLAN in its respective location.

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Versa Analytics has the capability to not only generate customized daily reports on bandwidth usage for all sites in the network but also to schedule these reports to be sent via email. This function allows administrators to receive reports without having to log into the Versa Analytics portal, streamlining the process and ensuring that they have the necessary information on a regular basis​​.

The diagram in the exhibit illustrates a hub and spoke topology where the spokes connect through a central hub. This is evident from the dashed lines that show the data flow between the spokes is mediated by the hub (Hub1). In this topology, while the spokes may have direct connections, the data flows between them pass through the hub. This kind of topology is commonly used in SD-WAN deployments to simplify routing and policy enforcement, which are managed centrally at the hub, as opposed to setting up direct paths between all spoke sites, which would be indicative of a full mesh or spoke-to-spoke direct topology.

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The default load balancing algorithm set in an SD-WAN Forwarding Profile is Weighted Round Robin (WRR). This algorithm assigns weights to each path based on the available bandwidth on the access circuit. WRR is recommended when paths with equal priorities are provisioned with different bandwidths, ensuring that traffic is distributed proportionally to the bandwidth of each path, which optimizes the utilization of network resources and maintains load balancing across the WAN circuits​​.

In a spoke-to-hub-only topology, the only prefixes advertised by default are the hub routes, and the spoke routes are not re-advertised by the hub branch. This topology is used when spokes do not have to communicate with each other, and a classic example is a network of ATM cashmachines where devices communicate exclusively with resources in the customer data center. The spoke devices, in this case, can send traffic only to networks behind the hub and not to other spokes directly or through the controller.

The Versa Operating System (VOSTM) is the software platform that provides routing, advanced SD-WAN, and SD-Security in a single software package. The VOS software is deployed in the branch, hub, cloud, and data center. Specifically, it is utilized within the Versa Controller, the Versa SD-WAN CPE, and the Versa SD-WAN Gateway, which are the components that use VOS to deliver their networking and security functions. Versa Director, on the other hand, is a centralized provisioning and management application that manages the VOS software instances but does not run the VOS itself. Versa Analytics is an analytics engine that provides insights into network traffic and events and also does not run the VOS itself.​

To ensure that a new CPE deployment has the required version of the Versa Operating System:

• Select preferred software version to 20.2.2 in the Device Bind Data (Answer C): Device Bind Data in Versa Director is the correct place to specify the operating system version for CPE devices. This configuration ensures that when devices are bound to their respective templates and workflows, they automatically fetch and load the specified software version, which in this case is 20.2.2.

References:This procedure aligns with Versa's deployment guidelines which stipulate that device-specific settings such as operating system versions should be managed through device bind settings to ensure consistency and compliance with organizational standards. This is detailed in the Versa deployment manuals which emphasize the importance of precise configuration in device bind data to maintain software uniformity across deployed devices.

In a Versa Secure SD-WAN solution configured with a Full Mesh topology, the true statement is that CPE devices send SLA probes on all possible transport paths between devices (B). This approach ensures any-to-any communication among branches, enabling direct communication using overlay tunnels without the need to transit through a hub or centralized site. SLA monitoring probes are utilized to track reachability and to measure link metrics for each access circuit towards any given remote site. These probes are critical for maintaining high-quality communication paths and for implementing traffic steering based on predefined SLA parameters​​.

The SLA profile shown in the exhibit appears to be set with thresholds for various metrics such as jitter, packet loss, and latency. These thresholds determine the acceptable performance criteria for the network. The profile is configured with specific maximums for packet loss, both in the forward and reverse directions, and for latency. If any of these configured values are exceeded, the SLA profile is triggered, indicating a breach of the desired service level agreement parameters. Therefore, if the packet loss value exceeds the maximum set in the profile, it will trigger an event or alert, which can then be used for remediation or for activating pre-defined traffic steering rules to maintain application performance.

In the architecture of Versa SD-WAN, the control plane plays a crucial role in the discovery and management of network topology:

• SD-WAN topology is discovered using MP-iBGP (Answer B): Versa utilizes Multi-Protocol Interior Border Gateway Protocol (MP-iBGP) for the discovery and management of the SD-WAN topology. This protocol helps in the efficient exchange of routing information within the network, enabling the Versa Director and other network components to maintain an updated view of network topology.
• Versa Private Address Family is used to advertise topology information (Answer C): This unique address family within Versa’s ecosystem is specifically designed to handle and distribute topology information across the network. It ensures that all relevant Versa devices are aware of the network structure and any changes to it.

References:These elements of Versa’s SD-WAN control plane are detailed in the technical specifications and white papers provided by Versa Networks, which explain the underlying mechanisms that support network operations and topology management within Versa’s infrastructure.

To implement a third-party application server as a virtual machine on a Versa CPE, the Service Chain Template should be used. This is because the Versa uCPE solution supports service chaining capabilities which are necessary for steering traffic to and from third-party virtual network functions (VNFs) to Versa Operating System (VOS) instances. The Versa uCPE solution can manage the lifecycle of third-party VNFs, including the ability to bring up an out-of-band management interface for each VM, connecting it to the Versa secure management channel, and routing management and control plane traffic accordingly​​.

Security zones in a Versa Secure SD-WAN solution group interfaces into security domains, controlling how traffic is processed and filtered through the network. These zones play a key role in the segmentation of traffic, improving security posture by enforcing distinct policies for different zones. They do not separate routing information into different routing tables or hide interfaces from tenants in a multi-tenant environment; rather, they are integral in the enforcement of security boundaries within the network.

In a Versa Secure SD-WAN solution, security zones are utilized primarily to group interfaces into security domains and provide segmentation of traffic. This approach enhances the security posture by isolating different types of traffic based on organizational policies or compliance requirements, thereby limiting the spread of threats across zones.

• Security Zones Group Interfaces into Security Domains (Answer A): Security zones in Versa SD-WAN are used to group multiple interfaces (either physical or virtual) into distinct domains. This grouping is strategic for enforcing security policies that are specific to a zone. For instance, a zone could be designated for guest access and have different access restrictions and monitoring compared to an employee zone.
• Security Zones Provide Segmentation of Traffic (Answer B): Traffic segmentation within Versa SD-WAN is achieved through the use of security zones. By segmenting traffic, organizations can enforce security policies tailored to the type of traffic or the sensitivity of the data within each segment. This is crucial for controlling resource access and reducing the potential impact of security breaches.

Security zones do not inherently separate routing information into separate routing tables (Option C), nor are they primarily used to hide interfaces from tenants in a multitenant environment (Option D).

References:This detailed explanation is based on the security management practices and capabilities defined in Versa Secure SD-WAN solutions, as outlined in the Versa Networks Academy Library and supplemented by standard network security principles.

Versa Secure SD-WAN features multitenancy, allowing multiple tenants to be managed within the same infrastructure with complete isolation and privacy. Additionally, it offers Role-Based Access Control (RBAC) to define and limit the permissions and access for users based on their roles within the organization. Versa also provides single-pane-of-glass management with embedded analytics, offering a consolidated view for managing, monitoring, and analyzing the SD-WAN infrastructure and traffic. This unified management approach simplifies administrative tasks and provides deep insights into the network and security operations.

In a Versa Analytics cluster, the node personalities include Search and Analytics. These personalities reflect the different roles each node in the cluster plays. The Search nodes are responsible for ingesting and indexing data, enabling fast and efficient search operations, while the Analytics nodes are responsible for processing and analyzing data, providing insights and reports. This separation of duties is key to the operation of a Versa Analytics cluster, ensuring optimal performance and reliability of the analytics platform.

To require users to justify their access to specific types of websites, such as social media sites, theCaptive Portal (Answer D)feature is used. This feature intercepts users' web requests, redirecting them to a portal where they must authenticate or provide justification for accessing the requested site. It is particularly useful in enforcing corporate policies and ensuring that access to certain types of sites is for legitimate business purposes.

References:The use of captive portals for controlling and monitoring access to web resources is a common practice in network administration, as outlined in Versa's configuration guidelines for secure network access and user authentication protocols.