Free Practice Questions for Versa Networks VNX100 Exam

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 CPEs support a variety of Quality of Service (QoS) functions to ensure effective bandwidth management and priority handling of network traffic. The three functions supported are:

Hierarchical queuing (Answer B): This QoS function allows for the creation of a multi-level queue structure, enabling more granular control of traffic prioritization and bandwidth allocation among various traffic classes.

Egress policing (Answer C): This involves setting maximum bandwidth limits for outbound traffic on network interfaces to prevent any traffic class from consuming excessive bandwidth and impacting the performance of other critical applications.

Classification (Answer D): This is the process of marking packets based on predefined criteria, which can include source or destination IP addresses, ports, or application types. Classification is essential for applying the appropriate QoS policies to different types of traffic.

References:These functionalities are extensively described in Versa’s configuration manuals, where the setup and implications of each QoS feature are discussed, ensuring optimal network performance and adherence to organizational policies.

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.

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​​.

When a speed test fails, it could be due to the speed test module not being activated or the speed test server not being enabled at the remote site. If the speed test module has not been activated, the required functionality to conduct the test will not be operational. Similarly, if the remote site does not have the speed test server enabled, it won't respond to speed test requests. Issues with the SLA path status or client configuration might be relevant to the performance and reachability but are not cited as direct reasons for a speed test failure within the documentation provided.

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 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.

Versa CPEs are indeed activated using Zero Touch Provisioning (ZTP), which automates the configuration process and reduces operational complexity. Furthermore, all components of the Versa SD-WAN solution support high availability configurations to ensure continuous operation and minimal disruption in the event of component failures. Versa Director and Versa Controllers can be deployed in redundant configurations, and Versa Analytics can be clustered for resilience and high availability.