Welcome back to the sea CSK Exam Prep course from Cyber Very and this module. We are going to create the foundation in the building blocks of content for subsequent modules and activities of this course. It's very important cause we're gonna be defining the core. What is cloud computing at at and
theoretical abstract business value level?
It really gives you a good perspective on ways you're going to look at things and the way we're going to analyse in more detail the various aspects and considerations that cloud brings in particular when it comes to security
moving forward in this video, we're going to review the definitions of cloud computing as well as the role of resource pooling in the cloud model. So while this information may be perceived as very introductory, if you have been working with Cloud, it's always good to take a step back and just re understand the core principles and foundations around cloud
so that you can have an intelligent conversation. Maybe somebody that's not so technical,
just explaining it in the most simplistic terms. What is cloud and why is it a big thing in the technology space?
So let's start by defining cloud computing itself. Here we have two different definitions. One from NIST one from Isil and Cloud isn't just a technology thing, right. It is an operational model for managing, controlling and paying for technology infrastructure that's being used.
So let's read the NUS definition of cloud computing. You're not gonna have to recite thes verbatim, but you're really gonna want to understand what these are and some of the important elements of these definitions, right? So Cloud computing is a model for enabling ubiquitous, convenient on demand network access to a shared pool of conjugal computing. Resource is
networks, servers, storage applications and services
that could be rapidly provisioned and released with minimal management effort or service provider interaction.
And we're gonna get further into defining and decomposing cloud, and you'll see which aspects of this definition really stand out to create a difference between just traditional virtualization and true cloud. Whether it's a public cloud private cloud, there are some things beyond just saying, Oh, it's virtual servers. Therefore it's the cloud. There's much more than that.
We look at the ice, so definition it's a paradigm for enabling network access to scalable and elastic pool of share a bowl,
physical or virtual resource is with self service provisioning and administration on demand. So you're starting to get a theme. It's more than just virtual machines, right, it elastic, agreeing, able to scale up, scale down, being able to self service and perform these operations without calling somebody sitting over in the data center
or some sort of an admin level person, right, enabling and users or enabling businesses more directly
to be able to allocate. Resource is from this common pool.
In fact, if we expand on that concept of a cloud as a pool of resource is, let's talk about it a little more right, it really is. The simplest way to describe Cloud is you take a bunch of computers, CPU, memory, ah, bunch of data storage devices, right?
You pull them all together, and then you have somebody who is responsible for managing those Physical resource is as well as the networking and connections between those resource is the network to access. Those resource is from an external place, whether it's over the Internet, such as a public cloud provider, right or even within an internal network.
And then we have this layer of virtualization that sits on top of that,
which allows the cloud users to allocate portions of those Resource is within these pools when they want to do it. And then when they're done with those, resource is, they let go of the resource is and they return them to the general pool it Zanon domain utility. It's a model for use. It's kind of like electricity, in a certain sense, right?
the pool's as they get allocated to the individual clients or customers
isolated from other clients and customers. Right. But
this common pool, maybe getting access by multiple clients and customers in different businesses in different industries, maybe even competitors, right? And that concept of having such a different audience tapping on the same resource pool is often referred to his multi tenant environment.
Um, and we'll be getting into that. You'll be hearing that term again and again.
Let's talk a little bit more about a cloud user. So I've mentioned client customer. I'm going to use certain terms interchangeably, but as a basis, let's define some of these things. So a cloud users a person or organization requesting in using the resource is
of the cloud. So this is a NIST term that, um that we're defining here. I might also call them a client. I may call it the Consumer. I might even say the term cloud actor, right? This is the end user, that the beneficiary of the cloud, the person who's paying the cloud. But on the other end of the spectrum, we have the cloud provider.
That's the person or organization that delivers and manages that resource pool,
the computer, the network in the storage. I might call it the service. I may say Cloud service provider. I mean, just a service provider, Um,
brokers, carriers, these or other aliases that you should just be aware of, because when you're taking the exam, these terminologies may be used. And then, of course, when I'm talking to it, I might flip between these different terms, But it's very important. We have, you know, the kind of the end user, the beneficiary of the cloud. And then we have the person who's providing and managing and taking care of
the cloud. And, of course, charging me in user for the cloud and doing some billing and so forth
that wraps it up for this video just to recap what we were looking at. At the tail end of the video, we reviewed the definitions of cloud computing the newest version as well as the ice. So definitions we looked at resource pooling the role of resource pooling as well as defining a lot of terminology that will be using for the remainder of this course
and you also encounter on the sea CSK exam.