Networking Fundamentals: DNS and Virtualization

Podcast Beta

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Who is responsible for the security of deployed applications and data in a cloud infrastructure?

The cloud provider

The company owning the applications and data (correct)

The general public

A third-party security service

What is the primary characteristic of a public cloud infrastructure?

It is used exclusively by a specific group of organizations

It is a combination of two or more deployment models

It is owned and managed by a single organization

It is open to use by the general public (correct)

What is a common feature of a hybrid cloud infrastructure?

It is used exclusively by a specific group of organizations

It is open to use by the general public

It is owned and managed by a single organization

It enables data and application portability (correct)

What is the primary characteristic of a private cloud infrastructure?

It is used exclusively by a single organization Signup and view all the answers

What is the primary characteristic of a community cloud infrastructure?

It is used exclusively by a specific group of organizations Signup and view all the answers

What determines the ownership and management of a private cloud infrastructure?

The organization or a third party (or a combination of both) Signup and view all the answers

What is the primary function of the Domain Name System (DNS)?

To provide a distributed lookup table of hostname to IP address Signup and view all the answers

What is the main difference between Virtualization and Dual Boot?

Virtualization runs multiple OS at the same time, while Dual Boot runs only one OS at a time Signup and view all the answers

What is a benefit of Virtualization in terms of hardware?

Legacy hardware is still supported Signup and view all the answers

What is the value of cloud computing in terms of scalability?

It is elastic enough to scale with the needs of your organization Signup and view all the answers

What is an example of Software as a Service (SaaS) in cloud computing?

A customer using an application running on a cloud infrastructure Signup and view all the answers

What is the key difference between Platform as a Service (PaaS) and Infrastructure as a Service (IaaS)?

PaaS provides access to applications, while IaaS provides access to infrastructure Signup and view all the answers

Who is responsible for the security of applications and data in Infrastructure as a Service (IaaS)?

The customer Signup and view all the answers

What is a key benefit of cloud computing in terms of cost?

Cost savings due to economies of scale and reduced infrastructure needs Signup and view all the answers

Study Notes

Domain Name System (DNS)

A distributed lookup table of hostname to IP address
Used by large-scale systems like Facebook and Google
Characteristics:
- Massive scale
- Fast enough
- Very reliable
Used in email servers (SMTP)

Virtualization

A technology that runs multiple same or different operating systems on a single machine
Each operating system is completely isolated from others
Example: running both Windows and Linux on the same machine
Benefits:
- Consolidation
- Redundancy
- Legacy hardware
- Migration
- Centralized management
Difference from Dual Boot: Virtualization runs multiple OS at the same time, while Dual Boot runs only one OS at a time

Cloud Computing

A pool of resources that can be rapidly provisioned in an automated, on-demand manner
Values:
- Economies of scale
- Elastic enough to scale with the needs of an organization
- Cost and operational benefits
- Easily accessed by users regardless of location
Service models:
- Software as a Service (SaaS): customers provided access to an application running on a cloud infrastructure
- Platform as a Service (PaaS): customers can deploy supported applications onto the provider’s cloud infrastructure
- Infrastructure as a Service (IaaS): customers can provision processing, storage, networks, and other computing resources

Cloud Deployment Models

Public: open to use by the general public, owned, managed, and operated by a third party
Community: used exclusively by a specific group of organizations
Private: used exclusively by a single organization, may be owned, managed, and operated by the organization or a third party
Hybrid: comprises two or more of the aforementioned deployment models, bound by standardized or proprietary technology that enables data and application portability

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

This quiz covers the basics of DNS, a distributed system that maps hostnames to IP addresses, and virtualization, a technology that allows running multiple operating systems on a single machine.