VNX100 Sample Questions Answers

A security pack (SPack) within Versa VOS includes predefined objects such as anti-virus definitions, URL categories and reputations, and IDS/IPS signature definitions. These are components of Versa VOS's unified threat management capabilities, which are utilized toprotect the network against security threats. Operating system security updates and Versa Analytics security updates are not mentioned as part of the SPack predefined objects in the provided documents.

When changes to a device configuration are made in the Versa Director through templates, it is crucial to ensure that these changes propagate to the actual branch device. The correct steps involve:

• Committing the Device Template configuration to the appliance (Answer B): This step is necessary because any changes made in the device template need to be actively committed to ensure they are pushed to the specific branch device orappliances that are associated with this template. This action updates the appliance with the latest configuration details, including the static IP address changes for the WAN link.
• Updating the Device Bind Data in Workflows with the IP address and gateway of the Internet WAN link (Answer D): This involves updating the binding configurations that specifically tie device templates to actual hardware or site-specific configurations. It is essential when changes such as IP addressing are involved, as the binding data must accurately reflect the network topology and addressing used by the devices.

References:The detailed steps and necessity for these actions are derived from standard Versa SD-WAN configuration practices as reflected in the comprehensive Versa configuration manuals and best practices documents available through Versa Networks Academy Library and configuration guides.

When a CPE device appears in the unknown device list in Versa Director Inventory during Zero Touch Provisioning (ZTP), it typically indicates a discrepancy in device identification details. Specifically,the device workflow configuration not having the correct serial number of the CPE defined (Answer C)can lead to this issue. The workflow configuration must accurately include the serial number so that Versa Director can recognize and authenticate the device as part of the organization’s network infrastructure. If the serial number in the workflow configuration does not match the serial number of the actual device, the Director will not be able to properly identify and classify the device, thus placing it in the unknown device list.

References:Versa’s official documentation on ZTP outlines the importance of accurate device identifiers in the workflow configuration to ensure successful device onboarding and recognition by the Versa Director.

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.​

The Versa Stateful Firewall feature encompasses a range of security capabilities, including Unified Threat Management (UTM), which may comprise antivirus, IPS, and web filtering services. It also provides Zone Protection, which enforces security policies based on the zones defined in the network to protect network segments. DDoS protection and DUP are also vital security functions, but they are not specified as capabilities within the Stateful Firewall feature set in the documents provided.

To apply a new URL filtering profile across all of the SD-WAN CPEs in response to a security event, you would use the Next Generation Firewall (NGFW) Template. This template is specifically designed to handle security functions, including application control, intrusionprevention, and URL filtering. By using the NGFW Template, you can enforce URL filtering policies that block or allow traffic based on URLs and categories, which is integral to controlling access to websites and ensuring network security​​.

In a remote Versa branch, the Control Virtual Router (Control VR) is the routing instance that has the default route to reach the Versa head-end components. This Control VR is typically dedicated to carrying control plane traffic between branch nodes and the SD-WAN controller, facilitating secure communications essential for the management and operation of the SD-WAN network.

Service templates are used to apply an identical QoS configuration to multiple CPEs, ensuring consistent quality of service across the network. Additionally, these templates are also employed to share an identical service configuration across different tenants within a multi-tenant architecture, ensuring uniform policy application while maintaining tenant separation.

When a Versa CPE security policy rule is configured to generate and send logging information on policy hits using the Default Logging Profile, Versa Analytics is the component that would allow you to view these logs. Versa Analytics provides extensive visibility into network traffic and security events, which includes logging information from security policies in action.​

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.

The Versa Operating System (VOSTM) includes a broad set of IP services. Specifically, it includes Carrier-Grade NAT (CG-NAT), which allows private network spaces to be mapped to public IP addresses; Multicast protocols such as IGMP and PIM (in Releases 20.2 and later); and the NTP server for time synchronization. HTTP Proxy and CDN are not listed among the included features for the Versa Operating System in the provided documents.​

Versa Secure Access (VSA) is designed to integrate with various authentication servers, including LDAP, and supports multifactor authentication methods like email and time-based OTP, integrating with authentication applications such as Duo, Google Authenticator, and Microsoft Authenticator. This makes the platform versatile in terms of supporting different enterpriserequirements for user authentication and enhancing security.​

The roles of a Versa Controller include onboarding SD-WAN VOS branches into the network and maintaining a secure control channel with each node. The Versa Controller authenticates branch VOS instances, handles management activities between the remote and headend nodes, and distributes control plane information. It does not provide Internet breakout, which is a function typically performed by edge devices at the branches themselves, nor does it provide clock synchronization to the branches, which is generally a function of network protocols like NTP that operate independently of SD-WAN control.​

Versa Analytics offers REST APIs that facilitate northbound integration with third-party tools, allowing for enhanced automation and the ability to pull data into external systems for additional processing or visualization. Moreover, it provides real-time traffic monitoringdashboards that deliver visibility into network performance, application usage, and security events, aiding in swift and informed decision-making. These dashboards are crucial for maintaining an overview of the network's current state and rapidly diagnosing issues.​

Versa Analytics offers a suite of features aimed at enhancing visibility and control over SD-WAN networks. The true statements about Versa Analytics are:

• Versa Analytics provides REST APIs for northbound integration with third-party tools (Answer B): Versa Analytics is equipped with REST APIs that facilitate northbound integration, allowing organizations to seamlessly connect and integrate Versa's network data with third-party management, monitoring, and analytics tools. This integration capability is crucial for enterprises that utilize a diverse set of tools for network management and need to consolidate their network operations on a single platform.
• Versa Analytics provides real-time traffic monitoring dashboards (Answer D): One of the key features of Versa Analytics is its real-time traffic monitoring dashboards. These dashboards provide network administrators with live insights into network performance, traffic flows, and usage patterns, enabling them to make informed decisions quickly and effectively manage the network.

Option A (Versa Analytics provides the ability to configure logging parameters on SD-WAN CPEs) is incorrect because while Versa Analytics does involve extensive logging capabilities, the configuration of logging parameters typically occurs at the device or controller level, not within the analytics platform itself. Option C (Versa Analytics provides centralized logging information about the SD-WAN environment) is somewhat misleading; while Versa Analytics does centralize data for analysis, it primarily focuses on providing analytical insights and data visualizations rather than merely centralizing logging information.

References:This explanation is based on the functionalities provided by Versa Analytics as part of the Versa SD-WAN solution, emphasizing its capabilities in network data integration and real-time monitoring.

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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