JN0-214 Sample Questions & Answers

A startup is launching a new web application and wants to minimize initial capital expenditure on hardware and reduce the burden of infrastructure management. Their development team is small and prefers to focus solely on writing and deploying application code, without managing the underlying operating systems, patches, or server scaling. Which cloud service model is the most appropriate choice for this startup?

During the deployment of a Virtual Network Function (VNF) such as a virtual firewall, an administrator observes high latency and packet loss. The VNF is running on a KVM hypervisor. The administrator suspects that the performance issue is related to how the VNF interacts with the physical network interface card (NIC). Which technology would provide the most significant performance improvement by allowing the VNF to bypass the hypervisor's virtual switch and interact directly with the physical NIC?

A cloud architect is designing a solution that requires flexible metadata to be carried within network overlay packets to signal information to different network functions and endpoints. The existing overlay solution, VXLAN, is too rigid as its header is fixed. The architect needs an encapsulation protocol designed for extensibility. Which network virtualization encapsulation technology should be selected?

A systems administrator is tasked with deploying a containerized application on a Linux host using Docker. The application inside the container needs to bind to port 80, but the host's port 80 is already in use by another service. The administrator wants to map port 8080 on the host to port 80 in the container. Which Docker networking mode and command flag should be used to achieve this?

An organization uses OpenStack Heat templates written in YAML to automate the deployment of multi-tier applications. A junior administrator is reviewing a template and needs to understand how one resource, like a virtual machine instance, can be configured to use a network port that is defined elsewhere in the same template. Which section of the Heat template is used to establish this kind of relationship and dependency?

A large enterprise has decided to adopt a hybrid cloud strategy. They need to maintain a private cloud on-premises for sensitive data and compliance reasons, while also leveraging a public cloud for scalable, customer-facing web applications. They require seamless network connectivity and consistent policy enforcement between the two environments. Which cloud deployment model are they implementing?

Case Study

A media streaming company, StreamNow, is modernizing its content delivery platform. Currently, they use a large fleet of bare-metal servers, which are difficult to scale and manage. They want to move to a virtualized environment to improve agility and resource utilization. The primary workload consists of video transcoding services, which are CPU-intensive and must run with minimal performance overhead. The operations team has strong Linux expertise and wants a solution that integrates deeply with the Linux kernel.

Their new architecture requires a virtualization platform that runs directly on the hardware (bare-metal) to maximize performance for the transcoding jobs. The solution must be open-source and widely supported by cloud orchestration platforms like OpenStack. The operations team also needs the ability to perform live migrations of these transcoding VMs between physical hosts for maintenance without interrupting the streaming service.

Based on these requirements, which virtualization technology is the most suitable choice for StreamNow?

A platform engineer is managing an OpenShift 4.10 cluster and needs to expose an application to external users via a custom hostname, app.example.com. The solution must handle TLS termination and support path-based routing for different services under the same hostname in the future. Which OpenShift-specific resource should be created to accomplish this?

An administrator is troubleshooting a Kubernetes 1.24 cluster where a newly deployed pod is stuck in the Pending state. The administrator runs kubectl describe pod and sees the event message: 0/3 nodes are available: 3 Insufficient cpu. What does this message indicate?

A network architect is designing a new data center fabric using Juniper Contrail Networking as the SDN solution. The fabric will consist of numerous compute nodes, each running a vRouter for packet forwarding. To ensure centralized policy enforcement and network automation, the architect needs to understand the flow of information within the SDN architecture. What is the primary function of the Contrail Controller in this environment?