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Which Container Network Interface (CNI) is selected by default in a VMware Kubernetes Service (VKS) workload cluster?
According to the VMware Cloud Foundation 9.0.4 Architecture and Design Guide, under the section ''VKS Cluster Networking'', VMware Kubernetes Service (VKS) supports two Container Network Interface (CNI) options --- Antrea and Calico --- for pod and service networking. The documentation explicitly states:
''A VKS cluster provisioned by the VKS supports two CNI options: Antrea (default) and Calico.''
It further explains that Antrea is automatically selected as the default and requires no explicit configuration unless the user specifies Calico in the cluster YAML file.
Antrea, developed by VMware, leverages Open vSwitch (OVS) for networking and supports advanced features such as network policy enforcement, encapsulation, and traffic visibility, making it the optimal default CNI for VKS clusters. Calico, using Linux bridge and BGP, remains an alternative for organizations requiring specific network topologies or integrations.
Thus, unless otherwise defined, all new VKS workload clusters in VMware Cloud Foundation are deployed using Antrea as the default network provider to maintain consistency, integration with NSX networking, and full compatibility with VCF lifecycle management.
Reference (VMware Cloud Foundation documents):
VMware Cloud Foundation 9.0.4 Design Guide -- ''VKS Cluster Networking: Antrea (default) and Calico options.''
VMware Cloud Foundation 9.0.4 -- ''Set the Default CNI for VKS Clusters'' (System-defined default: Antrea).
While designing a solution, an architect is tasked with defining limits for a vSphere Namespace.
What three limits are available? (Choose three.)
According to the VMware Cloud Foundation 9.0.4 Documentation (p.5802--5804), administrators can configure resource limits for vSphere Namespaces, which define how much CPU, memory, and storage can be consumed.
The guide specifies under ''Set Resource Limits to a vSphere Namespace'':
''As a vSphere administrator, you can set resource limits and container defaults on a vSphere Namespace. Options include CPU, Memory, and Storage. Container defaults set CPU limits, CPU requests, memory requests, and memory limits for containers within the Namespace.''
These limits provide governance and ensure that workloads deployed within a namespace do not exceed predefined consumption levels, maintaining cluster resource balance and preventing noisy-neighbor scenarios.
The document further clarifies that storage limits are applied per storage policy and CPU and memory limits define the total reserved compute capacity available to workloads and pods running in the namespace.
Reference (VMware Cloud Foundation documents):
VMware Cloud Foundation 9.0.4 --- ''Set Resource Limits to a vSphere Namespace'' (p.5802--5803)
VMware Cloud Foundation 9.0.4 --- ''Self-Service Namespace Template Provisioning Workflow.''
An architect has made an assumption that existing support staff are adequately skilled to operate the proposed infrastructure design.
The risk associated with this assumption would be that existing support staff are inadequately skilled to operate the proposed infrastructure design. How would the architect mitigate the risk?
The correct mitigation for a skills-based risk is to bridge the gap through training and upskilling. Providing time and budget for training ensures that existing staff can competently support the solution and aligns with long-term sustainability of the environment.
Option A does not address the skills gap, just adds capacity. Option C is a risk identification tool, not a mitigation step. Option D outsources the issue, which contradicts the goal of internal capability development.
VMware Cloud Foundation Architecture and Design Guide -- Risk Identification and Mitigation Strategies
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An architect is responsible for designing a new VMware Cloud Foundation (VCF)-based Private Cloud solution. During the requirements gathering workshop with key customer stakeholders, the following information was captured:
The solution must support a yearly workload growth of up to 10%.
When creating the design document, which design quality should be used to classify the stated requirements?
The requirement specifying 'yearly workload growth of up to 10%' relates directly to the system's ability to handle increased demand over time, which falls under the design quality of Performance. Performance in VMware Cloud Foundation design includes considerations for scalability and the ability to sustain projected growth. This requirement addresses the system's capacity to manage future workload expansion without degradation in service levels.
VMware Cloud Foundation Architecture and Design Guide 9.0 -- Design Qualities Section: Performance and Scalability
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An architect is designing for a VMware Cloud Foundation (VCF) Instance. The following requirements and constraints were documented:
* The management domain cluster utilizes vSAN stretched as the principal storage.
* Company policy states that compute and storage capacity utilization must not exceed 90% at all times.
Which three statements should the architect consider when designing the solution to satisfy the requirements? (Choose three.)
The VCF 9.0.1 Design Guide provides sizing best practices for vSAN stretched clusters, emphasizing capacity planning to accommodate failover conditions. It states:
''When sizing a stretched vSAN cluster, consider that in case of a site failure, all resources from the failed site must be supported by the surviving site. Therefore, compute and storage should not exceed 50% utilization per site.''
This translates into a maximum target utilization of ~45% compute and ~40% storage per site, ensuring compliance with the company's overall 90% capacity policy when combined across both sites.
A homogeneous cluster configuration (A) ensures consistent performance and predictable recovery during failover.
Reference (VMware Cloud Foundation documents):
VMware Cloud Foundation 9.0.1 Design Guide --- ''vSAN Stretched Cluster Capacity Planning and Sizing.'' (pp. 874--885)
VMware vSAN Design and Sizing Reference --- ''Cluster Utilization Planning for Failover Scenarios.''
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