In recent years, new technologies such as cloud computing, big data and virtualization have been dazzling. All of these technologies rely on data centers. This forced the network technology to be changed, a variety of new technologies continue to emerge, of which three new technologies deserve attention. Virtual switching technology Virtual switching technology allows multiple switching functions to be performed on the same physical device or single-function switching on multiple physical devices in the network. Virtual switching technology is the core concept of a multi-service network switching fabric. The essence of virtual switching technology is to realize some functions of network switching through a server, so as to replace some network functions of a network switch with a server. This not only simplifies the network, but also can reduce the cost of network construction. Some of the functions of the switch can be moved to the server. This technology is also the main push by server manufacturers. Server vendors also hope to obtain part of the network market through this technology. However, virtual switching technology is a new field, many server vendors have their own ideas, it is difficult to form a unified technical standards. The future development of virtual switching technology is unknown. There are not many opportunities in a short period of time. Large second floor technology Large Layer 2 technology is currently the hottest networking technology, access to data center customers widely recognized, and has been the scale of application. Large Layer 2 technology actually contains a variety of technologies, most of Cisco draft the most perfect, such as TRILL, OTV, LISP, PBB-EVPN, NPS, FabricPath and so on. Other network vendors are outdone, Juniper proposed QFabric, Huawei proposed CloudFabric, H3C proposed EVI. So many sophomore technology, which is more mature and better, there is no unified conclusion. Just as VXLAN emerged at a time of technical disagreements, a draft co-sponsored by VMware and Cisco that promptly got responses from all network vendors. VXLAN technology is also evolving at a very fast pace and is being used in every data center around the world. Big exchange technology Big exchange technology is concerned about the internal switch in the data center, the server can achieve a virtual, virtual, virtual and more virtualization technology, these virtualization technologies to the data center has brought substantial benefits, which makes the data center The network also made such needs. Virtualization of network devices not only facilitates management, but also divides and isolates network devices according to business needs so as to facilitate deployment of services. However, the realization of the realization of the internal network equipment, so are all proprietary technology, all network equipment manufacturers can not be achieved between the virtualization. Currently, there are several large switching technologies in this area, such as VSS and VDC in Cisco, CSS in Huawei, VSC in ZTE, and IRF in H3C. Although these technologies are not the same, they all implement device virtualization. Today, big switching technology has become a standard feature of data center network equipment. Virtual switching, large layer, large switching is the hottest data center network technology in the three major areas, each technology has derived a lot of subdivision categories, compete with each other. The three major technologies are currently taking root in the data center market, constantly opening up territories and promoting data center network technology to accelerate change. This alloy is designed for use in specialized electric and electronic applications.[24] Alloy 401 is readily autogenously welded by the gas-tungsten-arc process. Resistance welding is a very satisfactory method for joining the material. It also exhibits good brazing characteristics. It is covered by standard UNS N04401. monel 400,monel k500,monel metal,monel alloy 400,monel 400 seamless pipe,monel400 pipe Jiangsu Seonjip Technology Co.,Ltd. , https://www.seonjip.com