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korean cubic zirconia jewelry wholesale The content of network virtualization network virtualization generally refers to the virtual special network (VPN). VPN is abstracted to the concept of network connection, allowing remote users to access the internal network of the tissue, just like it is physically connected to the network. Network virtualization can help protect the IT environment, prevent threats from Internet, and enable users to access applications and data quickly and safely.
The virtualization method based on network is to achieve storage virtualization function between network devices. There are several methods below:
1. Virtualization based on interconnected devices
If it is symmetrical, the control information and data are on the same channel; if it is asymmetric, the control information and data are on different paths. In a symmetrical way, interconnection devices may become a bottleneck, but multiple device management and load balance mechanisms can slow down the contradictions of bottlenecks. At the same time, in multiple device management environments, when a device fails, it is easier to support the server to achieve failure. However, this will produce multiple SAN islands because a device only controls the storage system connected with it. Asymmetric virtual storage is more scalable than the symmetry formula, because the path of data and control information is separated.
It virtualization methods based on interconnection devices can run on special servers, and use standard operating systems, such as Windows, Sun Solaris, Linux, or operators. This method runs in the standard operating system, with many advantages based on hosting methods-easy to use and cheap equipment. Many device -based virtualized providers also provide additional functional modules to improve the overall performance of the system and can obtain better performance and more complete functions than standard operating systems, but require higher hardware costs.
, but the device -based method also inherits some defects based on hosting virtualization methods, because it still needs a proxy software or adapter -based adapter running on the host, any host's failure or inappropriate host configuration Can cause access to data that is not protected. At the same time, the interoperability between the heterogeneous operating system is still a problem.
2. Virtualization based on routers
The method based on router is to achieve storage virtualization function on the router firmware. Suppliers usually provide additional software running on the host to further enhance storage management capabilities. In this method, the router is placed in the data channel of each host to the storage network, which is used to intercept any command from the host to the storage system in the network.
antique jewelry wholesale Network virtualization is the most unclear definition of the field of virtualization segmentation in the field, and there is a concept of more controversy. The "network virtualization" in Microsoft's eyes refers to a virtual special network (VPN). VPN is abstracted to the concept of network connection, allowing remote users to access the internal network of the tissue, just like it is physically connected to the network. Network virtualization can help protect the IT environment, prevent threats from Internet, and enable users to access applications and data quickly and safely.
but the network giant Cisco doesn't think so. Cisco, who is famous and currently dominates the Internet, certainly uses the network as the core in the future consideration of IT. It believes that theoretically, network virtualization can place any traditional client -based client/server on the "network". Then, this means that the importance and business of Cisco in the industry will increase the importance and business of Cisco in the industry. Cisco said that network virtualization consists of three parts: access control, path extraction, and service advantages. From the perspective of Cisco's product planning map, the company's router and switches will have functions such as security, storage, VOIP, mobile and application. For Cisco, their strategy is to continue to make profits by expanding the sales of network infrastructure. For users, this can help them increase the value of network devices and adjust the original network infrastructure.
For another giant of the network camp, 3COM's actions in network virtualization are greater than Cisco. A working card can be inserted in the 3COM router. The card has a full -function Linux server that can be connected to the router center. In this Linux server, you can install such as SNIFFER, VOIP, security applications, and so on. In addition, the company also plans to run VMware on the Linux card in the future to allow users to run Windows Server. 3COM's open source network virtualization activity is named 3Com ON (also known as open network).
of course, Wang Po sells melon to sell himself, and his own wish of Cisco and 3COM must not be used as a sign of the banner of network virtualization. Now, network virtualization is still in the initial budding stage, but in the informationization of human network informationization Now, now, we have reason to believe that its breakthrough and growth will be rapid.
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