下列哪个不是虚拟化的主要特征(超融合和服务器虚拟化)

Virtualization technology is a technology that abstracts physical resources through software or hardware and creates virtual resources.

Virtualization technology is a key concept in the field of computing and information technology, and its definition covers multiple levels and application fields. In a broad sense, virtualization technology is a technology that abstracts physical resources through software or hardware to create virtual resources. This definition reflects the core ideas and methods of virtualization technology. Specifically, the main definitions of virtualization technology include the following aspects:

1. Resource abstraction: One of the core concepts of virtualization technology is resource abstraction, that is, physical resources (such as servers, storage, networks, etc.) etc.) to create upper-level representations of virtual resources. This abstraction allows multiple virtual resources to coexist on the same physical resource, allowing for more efficient use of hardware.

2. Isolation and isolation: Virtualization technology also includes resource isolation to ensure the mutual independence and security of different virtual resources. This prevents one virtual resource in the virtualized environment from affecting other virtual resources, improving system reliability and security.

3. Multiple instances: Virtualization technology allows the creation of multiple virtual instances on the same physical resource. This means that multiple operating systems, applications, or services can run simultaneously without interfering with each other.

4. Performance management: Virtualization technology also includes performance management, which enables system administrators to dynamically allocate resources to meet the needs of different virtual resources. This helps improve resource utilization and ensures efficient resource allocation.

5. Flexibility and portability: Through virtualization technology, virtual resources can be easily migrated to different hardware platforms or cloud environments, achieving flexibility and portability of applications and data.

Application fields of virtualization technology

1. Server virtualization: Server virtualization is the most common form of virtualization, which allows a physical Create multiple virtual machine instances on the server. This improves server resource utilization, reduces hardware costs, simplifies management, and provides the flexibility to enable multiple operating systems and applications to run on the same hardware platform.

2. Storage virtualization: Storage virtualization abstracts multiple storage devices into a single storage pool, making data management more convenient. This facilitates data backup, capacity expansion, data migration and data recovery, and improves the availability and manageability of storage resources.

3. Network virtualization: Network virtualization allows the creation of virtual networks and separates physical network resources into multiple logical networks. This helps with network isolation, traffic management, security, and application performance optimization. Network functions virtualization (NFV) is an important branch of network virtualization and is used to virtualize network function devices such as firewalls, routers, and load balancers.

4. Desktop virtualization: Desktop virtualization allows the user's desktop environment to be virtualized, and users can access their personal desktop from any device. This provides flexibility, security and central management, suitable for businesses and educational institutions.

The main characteristics of cloud computing services
(1) Ultra-large scale
"Cloud computing management system [2]" has considerable In terms of scale, Google Cloud Computing already has more than 1 million servers, and the "clouds" of Amazon, IBM, Microsoft, Yahoo, etc. all have hundreds of thousands of servers. Enterprise private clouds generally have hundreds or thousands of servers. "Cloud" can give users unprecedented computing power.
(2) Virtualization
Cloud computing supports users to obtain application services at any location and using various terminals. The requested resources come from the "cloud" rather than a fixed tangible entity. The application runs somewhere in the "cloud", but users don't actually need to know or worry about the specific location where the application is running. With just a laptop or a mobile phone, everything we need can be achieved through network services, even tasks such as supercomputing.
(3) High reliability
The "cloud" uses measures such as multiple copies of data, fault tolerance, and isomorphic interchangeability of computing nodes to ensure high reliability of services. Using cloud computing is more reliable than using local computers.
(4) Versatility
Cloud computing does not target specific applications. With the support of "cloud", ever-changing applications can be constructed, and the same "cloud" can support the operation of different applications at the same time.
(5) High scalability
The scale of "cloud" can be dynamically expanded and contracted to meet the needs of the growth of application and user scale.
(6) On-demand services
The "cloud" is a huge resource pool that you purchase on demand; the cloud can be billed like tap water, electricity, and gas.
(7) Extremely cheap
Due to the special fault-tolerance measures of the "cloud", extremely cheap nodes can be used to form a cloud. The automated centralized management of the "cloud" eliminates the need for a large number of enterprises to bear the burden of increasingly expensive data center management. Cost, the versatility of "cloud" greatly improves resource utilization compared with traditional systems, so users can fully enjoy the low-cost advantages of "cloud". It often only takes a few hundred dollars and a few days to complete what previously required tens of thousands of dollars. dollars and months to complete. Cloud computing can completely change people's future lives, but at the same time, we must also pay attention to environmental issues, so that we can truly contribute to human progress, rather than simply improving technology.
(8) Potential dangers
In addition to providing computing services, cloud computing services must also provide storage services. However, cloud computing services are currently monopolized in the hands of private institutions (enterprises), and they can only provide commercial credit. Government agencies and commercial institutions (especially commercial institutions that hold sensitive data like banks) should be sufficiently vigilant when choosing cloud computing services. Once commercial users use cloud computing services provided by private organizations on a large scale, no matter how strong their technical advantages are, these private organizations will inevitably hold the entire society hostage with the importance of "data (information)." For the information society, "information" is crucial. On the other hand, data in cloud computing is confidential to cloud computing users other than the data owner, but there are really no secrets to the commercial organizations that provide cloud computing. This is just like ordinary people cannot monitor other people's phone calls, but within telecommunications companies, they can monitor any phone call at any time. All these potential dangers are an important prerequisite that commercial institutions and government agencies must consider when choosing cloud computing services, especially cloud computing services provided by foreign institutions.

What is not a characteristic of information technology is: extremely low risk.

The basic characteristics of information technology are digitization, networking, multimedia, intelligence, and virtualization.

Information Technology (IT) is a general term for various technologies mainly used to manage and process information. It mainly applies computer science and communication technology to design, develop, install and implement information systems and application software. It is also often referred to as information and communications technology. It mainly includes sensing technology, computer and intelligent technology, communication technology and control technology.

The study of information technology includes science, technology, engineering and management disciplines, their application in the management, transfer and processing of information, related software and equipment and their interaction.

Application of information technology:

The application of information technology includes computer hardware and software, network and communication technology, application software development tools, etc. Since the popularization of computers and the Internet, people have increasingly used computers to produce, process, exchange and disseminate various forms of information (such as books, business documents, newspapers, records, movies, TV programs, voices, graphics, images, etc.).

Information technology has the general characteristics of technology - technicality. The specific manifestations are: scientific method, advanced tools and equipment, proficiency of skills, rich experience, quickness of the action process, high efficiency of functions, etc. Information technology has a characteristic that distinguishes it from other technologies—informationality.

The specific performance is as follows: the main service subject of information technology is information, and the core function is to improve the efficiency and effectiveness of information processing and utilization. Determined by the nature of information, information technology also has characteristics such as universality, objectivity, relativity, dynamics, sharing, and convertibility.