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下面为大家整理一篇优秀的essay代写范文- Network virtualization，供大家参考学习，这篇论文讨论了网络虚拟化。当前社会，在许多金融机构中，开始出现了许多大型的数据中心。这些中心在运转的过程中，为了能够实现节约资源减少服务器占据空间的目标，会更多的应用虚拟化的技术，切实保证能耗的降低。但是，在虚拟化中，网络虚拟化的发展比较缓慢，落后于服务器虚拟化和存储的虚拟化。在信息技术发展的实践过程中，软件定义技术更加适合开展网络虚拟化，对于推动互联网行业的发展有著非常重要的作用。

In order to better meet the needs of people's life and the needs of production, network technology has been well developed. Traditional web technologies contain only a single data business, but now they have evolved into a service that includes multiple applications. Generally speaking, these services are provided by different suppliers, as a result, these services are difficult to use a single architecture, if for modify existing framework will become more complex. The reasons for the Internet's own technology will also impose certain restrictions on its mobility, which will make the extension performance of its router unmanifested. This will have an important impact on the development of new network technologies. In order to better adapt to the development of the society, to solve various problems of the network technology, network virtualization technology being developed, and gradually become an important part of the field of network development.

Network card virtualization is an important part of network equipment virtualization. Meanwhile, network card virtualization includes two parts: software network card and hardware network card. In the process of software network card virtualization, the main way is to use the software to control the virtual machine, and then realize the sharing of a network card. Using the software network card virtual network card can have a separate MAC address and IP address, and so on. All virtual network CARDS can be connected to a physical switch via a virtual switch. Then, the virtual switch device should forward its existing data from the physical network. Different functions such as security control can be realized on different bases. In the process of virtual server, the technology used is to simulate a virtual port through software, so that it can better adapt to the needs of the simulator.

In the network hardware equipment virtualization, mainly contains two aspects of content. The first is to perform the router's functionality in a traditional way of installing operations on an X86 architecture. The second is the virtualization of traditional network hardware devices. Depending on the hardware, the operating system of the network device will be customized, which will play an important role in improving the speed of the machine operation. With the development of network technology and social economy, how to provide low-cost network solutions has become a popular topic. Some companies have proposed the separation of operating system and hardware for the low price characteristics. So can effectively reduce the hardware platform of the constraints, can quickly occupy the market, at the same time, in order to effectively promote the use of large equipment port is small, reduce equipment investment, can also for physical device virtualization, the formation of multiple devices, and that in each device independent running normally. In order to carry out more effective management and control, it is possible to have multiple physical devices virtual as one, which will also have a better development prospect.

In the process of daily application, link virtualization is a widely used technology, which is widely used in link aggregation and tunnel protocol. Link aggregation, as a two-layer virtual technology, can bind multiple physical ports together so that a logical port can be formed. If the switch detects a certain failure in a physical port, the message work will terminate. On the basis of reanalyzing the port, select a redundant port to send. The application of link polymerization technology can effectively extend link bandwidth, which has certain effect on ensuring the practicability of link. The use of dual links is a good way to achieve network redundancy. After the calculation is completed, a link will be in the state of the Block. In this context, virtual road link polymerization technology is presented, which is of great importance to solve the problem that traditional aggregation ports cannot cross equipment and increase network bandwidth.

In the tunnel protocol, the content involved is mainly a technology or protocol subnet that USES another technology or protocol network to realize interconnection or data transfer. With the tunnel protocol, the data of other protocols can be integrated and repackaged, and the new frame header can be sent by the tunnel to provide effective router information. So anyone can send the data to the specified address and hide the network address of the intermediate node. Moreover, it can also carry out effective data encryption based on the actual demand.

Cascading networks, as the name suggests, build another network on an existing network, forming layers. This network allows some host router information that is not identified on the IP address. At the same time, the routing information can be applied to a particular node, but the IP address of this node is unknown in advance. With the application of cascade network, we can continuously excavate and make full use of existing resources without increasing operating cost, and provide better service. The most common is ADSL Internet access line, which is implemented on the existing PSTN network.

A common communication method between large and medium-sized enterprises and large groups is a virtual private network. The main thing is to use the common network architecture. Internet media, for example, USES this medium for information transmission. The main purpose is to use the encrypted tunnel protocol to achieve the purpose and effect of confidentiality, which can also realize the terminal authentication and ensure the accuracy of the information. In view of such technology could be effective security in an insecure network information transmission, in the process, we should attach great importance to information encryption sex, avoid not encrypted information being stolen.

Virtualization technology revolutionized the citic publishing house architecture of the application of practical design requirements of the structure, by applying the virtual and dynamic migration technique, has a higher requirement for network technology, to support a wider range of layer 2 domain. Generally speaking, the three-tier router can connect multiple data centers, and the two layer network communication is the basis for realizing the three-layer routing connection. Therefore, it is necessary to apply the virtual two-layer extension network.

To sum up, with the development of the network, more and more problems have been solved, and the virtualization technology has become an important means to solve these problems. At present, some research has been done on virtual network technology, and some achievements have been made. However, in the process of practical application, all kinds of problems can be easily encountered. Therefore, we should pay attention to innovative technologies and methods based on the actual situation, strengthen research on relevant issues and technologies, and find more effective solutions to relevant problems. In this way, the equilibrium of physical network resource distribution is better realized, and the efficiency of network resources is effectively improved.

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