Virtual Machine & Containers

What is a virtual machine?

• A type of physical computer

• A network of interconnected computers

• A software program that enhances computer performance

• An emulation of a computer system that runs on a physical machine.

Explain the concept of containerization technology.

• Containerization technology is a method of packaging, distributing, and running applications within containers, which isolate the application from the underlying system and ensure consistency in deployment.

• Containerization technology is a method of compressing files to reduce storage space.

• Containerization technology involves physical storage of goods in large containers for transportation.

• Containerization technology refers to the process of organizing items in a container store.

What are the key differences between virtual machines and containers?

• Virtual machines and containers both use the same underlying technology

• The key differences between virtual machines and containers are that virtual machines emulate a complete hardware environment, including the operating system, while containers share the host system's kernel and only package the application and its dependencies. Virtual machines are heavier in terms of resource usage and slower to start compared to containers.

• Containers are more resource-intensive than virtual machines

• Virtual machines and containers have identical startup times

How does virtual machine security work?

• Firewall, antivirus, physical security

• Biometric authentication, intrusion detection, network segmentation

• Isolation, access controls, encryption, secure boot, and updates

• Data obfuscation, password complexity, multi-factor authentication

What are some common security measures for virtual machines?

• Using outdated software and patches

• Sharing passwords across multiple virtual machines

• Leaving default configurations unchanged

• Implementing firewalls, regularly updating software and patches, using encryption, restricting access, monitoring network traffic, and implementing intrusion detection systems.

Describe the benefits of using containers over virtual machines.

• Containers are slower to start up than virtual machines

• Containers are less portable than virtual machines

• Containers are heavier in terms of resource usage compared to virtual machines

• Containers offer benefits such as lightweight nature, faster startup times, improved performance, and enhanced portability compared to virtual machines.

What is Docker and how is it related to containers?

• Docker is a programming language

• Docker is a platform for developing, shipping, and running applications using containers.

• Docker is a type of virtual machine

• Docker is used for creating websites

What is a hypervisor in the context of virtual machines?

• A hypervisor is a software that creates and runs virtual machines.

• A hypervisor is a type of antivirus software for virtual machines.

• A hypervisor is a programming language used to develop virtual machines.

• A hypervisor is a hardware component that creates and runs virtual machines.

How can you secure containers in a production environment?

• Implement strong access controls, update container images and dependencies regularly, monitor container activity, enable network segmentation, and use security tools.

• Never update container images or dependencies

• Disable all security tools

• Share container access credentials openly

Discuss the concept of microservices and its relationship with containers.

• Microservices and containers have no relationship and are used independently.

• Microservices and containers are closely related as containers provide an ideal environment for deploying and managing microservices due to their lightweight nature, portability, and ease of scaling.

• Containers hinder the deployment of microservices due to their complexity.

• Microservices are only compatible with virtual machines, not containers.