Nt1310 Unit 5 Core Technologies

Virtualization is a combination of software and hardware engineering that creates Virtual Machines (VMs) - an abstraction of the computer hardware that allows a single machine to act as if it were many machines, or a computer that does not physically exist as a piece of hardware. The hardware that is seen by the operating system is emulated in an effort to separate the physical hardware from operating system. This allows the virtual machine to be moved and hosted on any machine independent of hardware. Virtualization technology is possibly the single most important issue in IT and has started a top to bottom overhaul of the computing industry which is why many companies around the world have are using its softwares to enhance their business opportunities.

Virtual Machine Security - Full Virtualization and Para Virtualization are two kinds of virtualization in a cloud computing paradigm. In full virtualization, entire hardware architecture is replicated virtually. However, in para virtualization, an operating system is modified so that it can be run concurrently with other operating systems. VMM Instance Isolation ensures that different instances running on the same physical machine are isolated from each other. However, current VMMs do not offer perfect isolation. Many bugs have been found in all popular VMMs that allow escaping from VM (Virtual machine). Vulnerabilities have been found in all virtualization software, which can be exploited by malicious users to bypass certain security restrictions or/and gain escalated privileges. ation software running on or being developed for cloud computing platforms presents different security challenges. It is depending on the delivery model of that particular platform. Flexibility, openness and public availability of cloud infrastructure are threats for application security. The existing vulnerabilities like Presence of trap doors, overflow problems, poor quality code etc. are threats for various attacks. Multi-tenant environment of cloud platforms, the lack of direct control over the environment, and access to data by the cloud platform vendor; are the key issues for using a cloud application. Preserving integrity of applications being executed in remote machines is an open

We can create a controller object to handle the REST requests (GET, POST). In this controller we can use action routing [48] to control which function will handle which request. In every function, we can do some computations with the data, make decisions and use the HTTP web client to construct and send responses to the partner end point URLs.

By treating process as isolated virtual machines modern computers can run them concurrently while maintaining the stability, and data integrity. As the tech support for my family this has an enormous impact since the overall stability of these devices are vastly improved, and although complexity has increased, problems are better isolated and easier to fix. Consequently I spend less time fixing software problems.

Performs a HEAD or GET request against either the root directory or any optional directory of an Apache JServ Protocol server and returns the server response headers.

Virtualization is being able to give a physical device the power, through the use of software, to do more than that physical device was technically designed and able to do (Santana, 2014, p. 12). For example, a server can only run one operating system at a time. However, when a hypervisor is used in a server, the hypervisor is a layer of software that acts like the server itself so that many operating systems can be run from that one server. The hardware, in this case a server, has been virtualized. The goal is to use all of the computer’s resources all of the time, and the only way to do that is to have enough things running that the resources are being used consistently and efficiently. An analogy for this could be online classes. If each teacher only had one student, the teacher’s resources of time and expertise would not be utilized efficiently because that one student will not need help all day, every day. If the teacher is assigned to fifteen students, the students can still get help when needed from the teacher, and they would not even be aware that they are not alone in the class. Because it is an online class, the teacher does not need any more physical resources to teach an entire class than was needed for one student. The students are receiving the benefits of being taught by that teacher without needing to be with him or her physically.

Network virtualization is categorized as either external virtualization, combining many networks or parts of networks into a virtual unit, or internal virtualization, providing network-like functionality to software containers on a single network server.

Hypervisor is the virtualization layer which is responsible for the virtualization. a virtualization platform that allows multiple virtual machines to run on a physical host at the same time

These virtual machines have a separate operating system, memory, processor and other resources which is the shared by the resources of the

The host operating system consumes CPU, memory and other hardware IT resources. Licenses are usually required for host OS, in addition to individual licenses for each of their guest OS.

The technology keeps growing and advancing on every single aspect on the computers field, desktop and server cannot be the exception, a very specific case is the system virtualization. The creating of a virtual version of a device or resource makes virtualization a great tool for network engineers and system administrators on the daily managing configuration, testing and creating of systems. As a first look is inarguable the advantages that can come with the virtualization of system environments, but has virtualization overcome regular computer using? Is it reliable? It is cost effective? What are the advantages and disadvantages?

Virtualization has rapidly grown from a technology. It used for labs and development work to a core IT infrastructure technology. Virtualization has always been a complex technology, for reducing this complexity Microsoft has founded a various virtualization products with similar-sounding yet nondescript names such as Hyper-V, App-V, and MED-V ,Microsoft User Environment Virtualization (UE-V),Remote Desktop Services, and system center Virtual Machine Manager. Each one is designed to provide a solution to a different business problem. To understand this virtualization we need to know about the Microsoft virtualization terminology and methodology.

In today’s network environment we are required to offer more applications and services than ever before. Users are needing a variety of applications that may not be compatible with a single operating system or may require more processor or memory than can be reasonably provided on a workstation. These and many other situations are making application and desktop virtualization not only a different way to do business, but also resolve some of the compatibility issues that can arise from the array of software that is used today. To implement these technologies, you need to understand how they operate as well as your options for software to implement them. A good understanding of requirements, protocols and security will help ensure a successful deployment.

Virtualization is a term used to describe technology that uses abstraction to instruct a guest operating system, data storage, or network device to use underlying shared hardware or software as described by Pearce et al. [1]. Abstraction is managed at a software layer known as a virtual machine monitor (VMM) or hypervisor. The VMM or hypervisor emulates hardware to guest operating systems and applications, which includes core processor unit (CPU), memory, input/output (I/O), and network traffic [1, pp.2]. There are different areas of virtualization, which include server virtualization, application virtualization, network virtualization, storage virtualization, and desktop virtualization [1, pp.8]. The branching out of virtualization into different areas displays the rapid growth of this technology.

And all of this runs "on top of" an os, such as Windows or Linux system.