50 VMware Telco Cloud NFV Skills Practice Questions: Question Bank 2025

A telco is designing a Telco Cloud Infrastructure (TCI) deployment to host multiple VNFs with strict CPU and memory performance requirements. Which design choice best aligns with NFV best practices for predictable performance?

An administrator needs to onboard a new VNF package into the NFV platform so it can be instantiated repeatedly with consistent configuration. Which package content is most critical to include to enable repeatable deployments?

Operations reports that a subset of VNF instances intermittently lose connectivity on a specific tenant network, but management access remains stable. Which NSX-related component should be checked first to validate dataplane health on the affected hosts?

A platform operator wants to ensure that only approved VNF images are used in production and that image integrity can be validated during onboarding. What is the recommended approach?

A VNF requires multiple networks: management, signaling, and high-throughput dataplane. The operator wants to segment traffic and apply security policies per network without relying on the VNF's internal firewall. Which approach best meets the requirement?

A new VNF instantiation fails during initial configuration because the VNF cannot retrieve its day-0 configuration. The operator confirms the VNF VM powers on successfully. What is the most likely cause in an automated NFV deployment workflow?

A telco requires maintenance on several hosts but must minimize service impact to VNFs with strict anti-affinity requirements (active/standby pairs must not run on the same failure domain). Which operational approach is most appropriate?

A design includes multiple sites and the operator wants to reduce the blast radius of network failures while keeping VNF deployments consistent across sites. Which architecture decision best supports this goal?

After enabling an additional high-throughput interface for a VNF, throughput remains far below expectation and CPU utilization is unusually high on the VNF VM. The physical network is confirmed healthy. Which change is most likely to improve dataplane performance in a Telco Cloud NFV environment?

A security audit requires that east-west traffic between VNFs is controlled and logged, and that policy enforcement remains effective even if a VNF's guest OS firewall is misconfigured. Which solution best satisfies these requirements in a VMware telco cloud environment?

A CSP is designing a Telco Cloud Infrastructure that must tolerate a single host failure without impacting VNF availability. Which VMware capability most directly provides this requirement at the compute layer?

You are deploying a VNF that requires two interfaces: one for management and one for data. The design calls for strict separation so that management traffic cannot traverse the data network. Which approach best meets this requirement in a VMware-based telco cloud?

Operations needs a quick way to identify which VMs belong to a specific network service instance across multiple clusters. Which practice is most effective for enabling this kind of filtering and reporting?

A VNF onboarding fails with an error indicating the VM cannot be placed because the required "SR-IOV" capability is not available. Which is the most likely cause?

A tenant reports intermittent packet loss on a data interface. The VM is connected to an overlay segment. Physical switches show no errors. Which NSX-related issue is most likely to cause intermittent loss specifically on overlay networks?

A CSP wants to ensure VNFs with strict latency requirements are not impacted by noisy neighbors. Which vSphere configuration best aligns with this goal?

During day-2 operations, an administrator needs to roll out a configuration change to a large group of VNFs while minimizing risk. Which approach is the best practice?

A VNF requires micro-segmentation so that only specific ports from a limited set of sources can reach its data-plane interface, regardless of which ESXi host the VM runs on. Which solution best enforces this policy consistently?

A distributed VNF consists of three VM components (A, B, C) that must not run on the same ESXi host due to fault-domain requirements. At the same time, components A and B should be kept in the same rack when possible to reduce latency. Which design best meets both requirements?

After a maintenance event, several VNFs restart but fail to re-establish data-plane connectivity on an overlay segment. Management connectivity is fine. Logs show that the host can reach vCenter, but TEP-to-TEP connectivity is inconsistent between hosts. Which root cause is most likely?

A telco wants to maximize availability for CNFs running on Telco Cloud. Which Kubernetes/cluster design best aligns with resilience best practices for control plane availability?

A team is onboarding a new VNF that requires CPU pinning and huge pages to meet latency targets. Where should these settings be applied to ensure consistent placement and performance?

Operators want to prevent day-2 configuration drift on ESXi hosts used for NFV workloads and be alerted when an unauthorized change occurs. Which approach best supports this operational requirement?

A VNF onboarding fails because the instantiated VMs do not attach to the expected network segment. The descriptor specifies multiple networks and requires separation of management and data traffic. Which misconfiguration is the MOST likely cause?

A CNF requires strict east-west isolation between namespaces while still allowing controlled ingress from a shared services namespace. Which solution best addresses this requirement in a Telco Cloud Kubernetes environment?

After a maintenance window, a subset of VNFs experiences intermittent packet loss on the data plane. VM-level pings to the default gateway are stable, but high-throughput flows drop. Which next step is MOST appropriate to isolate the issue in a virtualized NFV data path?

Operators need to perform rolling upgrades on the Telco Cloud platform while minimizing impact to VNFs/CNFs. Which operational practice is MOST aligned with telco-grade availability goals?

A telco is designing underlay/overlay networking for NFV where high throughput is required, and they must support multi-tenant segmentation across many VNFs. Which architecture choice best meets these requirements?

A CNF intermittently fails liveness probes during peak load. Node metrics show CPU saturation and pod throttling. The CNF is configured with low CPU requests but high CPU limits. What change is MOST likely to improve stability without overprovisioning the entire cluster?

Security requires that only specific management systems can access ESXi/vCenter management interfaces, and all other traffic must be blocked by default. Which design best satisfies this requirement with least operational complexity?

A Telco Cloud Infrastructure (TCI) cluster is being prepared to host VNFs that are sensitive to CPU scheduling latency. Which ESXi host configuration is the BEST practice to help reduce “noisy neighbor” CPU contention?

An operator wants to standardize Day-0 onboarding of NFVI hosts so that networking, storage, and baseline settings are applied consistently before any VNFs are deployed. Which approach best supports this goal in a VMware Telco Cloud environment?

A VNF requires three separate networks: management, signaling, and data. The architect wants strong isolation between these networks while still using a shared physical fabric. Which design choice best meets the requirement?

During a maintenance window, an administrator needs to patch hosts with minimal service disruption for VNFs that support live migration. Which vSphere feature is most directly used to relocate running workloads off a host before patching?

A VNF onboarding fails because the deployment tool reports that the VM image cannot be pulled from the repository. Networking is confirmed working, and credentials are correct. The repository uses a self-signed certificate. What is the most likely root cause?

A telco operator wants to implement east-west micro-segmentation for VNFs, allowing only specific service-to-service flows while denying all others by default. Which solution best addresses this requirement in a VMware-based Telco Cloud?

A VNF has strict storage performance requirements and must consistently meet IOPS and latency targets even when other workloads are busy. Which vSphere capability is most appropriate to help enforce predictable storage performance?

An operations team wants to proactively detect configuration drift and compliance issues across multiple Telco Cloud clusters (for example, NTP, syslog, and security hardening settings). Which approach best supports continuous compliance?

A VNF requires high throughput and low latency on the data plane and will use a user-space packet processing stack. The design calls for bypassing the hypervisor networking stack as much as possible. Which option most directly supports this requirement?

After a scale-out event, a subset of VNFs fails to initialize correctly because their affinity/anti-affinity rules were not honored, leading to multiple active instances on the same host and violating resiliency requirements. Which configuration change best prevents this from recurring?

A telco wants to ensure deterministic packet forwarding for a latency-sensitive VNF. The VNF requires direct access to a high-performance datapath while still being managed by vSphere. Which approach best meets this requirement?

During onboarding, a CNF requires strict CPU pinning and huge pages for its data-plane pods. Which Kubernetes mechanism is typically used to guarantee these node-level resource requirements are met at scheduling time?

A VNF deployment fails because the management network is reachable, but the VNF cannot reach external services on the data network. The physical switch ports connected to ESXi are configured as trunk. What is the MOST likely missing configuration on the virtual networking side?

An operator wants to reduce blast radius during maintenance by ensuring that only one VNF instance per host is restarted at a time, while still allowing upgrades to proceed. Which construct best supports this goal in a telco-grade Kubernetes deployment?

A telco cloud uses separate management, storage, and data-plane networks. Security requires that east-west management traffic be micro-segmented, but data-plane traffic must remain high-throughput and avoid unnecessary encapsulation. What is the recommended design approach?

A VNF requires anti-affinity so that its active and standby instances never run on the same ESXi host. Which vSphere feature is the best fit to enforce this placement requirement?

After a planned node drain, several CNF pods remain Pending with events indicating "Insufficient cpu" even though cluster utilization appears low. The nodes show allocatable CPU significantly less than capacity. What is the MOST likely cause in a telco CNF context?

A new VNF onboarding requires isolating SR-IOV VF traffic per tenant while still enabling centralized policy management. Which solution best aligns with this requirement?

An operator must design a telco NFV cluster to survive a full host failure without service interruption for a stateful VNF pair (active/standby). The standby must be ready to take over with minimal time. Which design is MOST appropriate?

A CNF data plane uses DPDK and requires exclusive access to specific NIC queues and CPUs. After enabling live migration, performance becomes unpredictable and packet loss increases. What is the BEST corrective action?