Exploring Virtualization and Containers

What are the main types of virtualization?

• Application Virtualization

• Cloud Virtualization

• Hardware Virtualization, Software Virtualization, Network Virtualization, Storage Virtualization

• Database Virtualization

Define full virtualization and its use cases.

• Full virtualization requires no hypervisor to function.

• Full virtualization is primarily used for gaming applications.

• Full virtualization allows multiple OS to run on a host via a hypervisor, used for server consolidation, testing, legacy apps, and isolated environments.

• Full virtualization only allows one OS to run on a host.

What is paravirtualization and how does it differ from full virtualization?

• Paravirtualization requires no modifications to the guest OS and is fully aware of the hypervisor.

• Paravirtualization is a method that does not involve any interaction between the guest OS and the hypervisor.

• Paravirtualization allows direct communication between the guest OS and hypervisor, requiring OS modifications, while full virtualization does not require such modifications and the guest OS is unaware of the hypervisor.

• Full virtualization allows direct communication between the guest OS and hypervisor without any modifications.

Name a popular container orchestration tool.

• Apache Mesos

• Docker Swarm

• OpenShift

• Kubernetes

What is the primary function of Kubernetes?

• Managing virtual machines

• Automating the deployment, scaling, and management of containerized applications.

• Orchestrating physical servers

• Providing cloud storage solutions

How does Docker differ from traditional virtualization?

• Traditional virtualization is faster than Docker.

• Docker does not use the host OS kernel.

• Docker requires a separate OS for each container.

• Docker is more lightweight and efficient than traditional virtualization, as it shares the host OS kernel instead of requiring separate OS instances.

What is a hypervisor and what are its types?

• Type 3 (cloud-based) and Type 4 (virtual)

• Type 1 (virtual) and Type 2 (cloud-based)

• Hypervisor types: Type 1 (bare-metal) and Type 2 (hosted).

• Type 1 (hosted) and Type 2 (bare-metal)

Explain the difference between Type 1 and Type 2 hypervisors.

• Type 1 hypervisors are always virtual machines, while Type 2 hypervisors are not.

• Type 1 hypervisors are slower than Type 2 hypervisors due to their architecture.

• Type 1 hypervisors require an operating system to function, while Type 2 hypervisors do not.

• Type 1 hypervisors are bare-metal and run directly on hardware, while Type 2 hypervisors are hosted and run on an operating system.

List three benefits of using virtualization in IT environments.

• Limited scalability options

• 1. Improved resource utilization 2. Simplified management 3. Enhanced disaster recovery options

• More complex network configurations

• Increased hardware costs

How does virtualization improve resource utilization?

• Virtualization requires more physical hardware to function effectively.

• Virtualization isolates resources to prevent sharing among applications.

• Virtualization improves resource utilization by allowing multiple virtual machines to share the same physical hardware, optimizing resource allocation and reducing waste.

• Virtualization decreases the number of virtual machines on a server.