JNCIA-Cloud JN0-213 Passing Score

Overlay networks are indeed virtual networks. They are logical constructs that stitch together disparate, dispersed network infrastructure, often referred to as underlay1. Underlay networks refer to the physical network infrastructure, while overlay networks implement network virtualization concepts2. References from Juniper site: Baeldung on Computer Science, PacketFabric, Cisco, HPE Aruba Networking

The default container runtime engine used by OpenShift is cri-o. CRI-O is an open source, community-driven container engine. Its primary goal is to replace the Docker service as the container engine for Kubernetes implementations, such as OpenShift Container Platform3.

The cloud computing feature that automatically increases or decreases the resources based on the demand is known as rapid elasticity1112. In cloud computing, scaling is the process of adding or removing compute, storage, and network services to meet the demands a workload makes for resources in order to maintain availability and performance as utilization increases11.

Containers perform abstraction at the application layer12. They are executable units of software in which application code is packaged along with its libraries and dependencies, in common ways so that the code can be run anywhere—whether it be on desktop, traditional IT or the cloud12.