After several years of accumulation, Gigabit Ethernet products are receiving market attention. Not long ago, the market research firm Dell'OroGroup released the second quarter of this year Network equipment Market research report. Survey, second quarter of 2008, the global Gigabit Ethernet Switches Market there are two important milestones: a total sales income for the first time more than 600 million U.S. dollars, the other is port shipments for the first time more than 250,000. Application of induced demand
Dell'Oro analyst firm believes that the application of Gigabit Ethernet equipment, the trend will continue, some new and emerging areas, such as traffic management and application layer networks. Stimulated by new applications, Cisco, F5 and Citrix, the company's new generation Switching equipment Than regular Ethernet switch market to maintain a higher growth rate. Voice, video and other types of large data data integration needs in the increasingly frequent transmission network, IP telephony, video conferencing, high-capacity applications such as database group not only growing demand for network bandwidth, but also to existing Routing Switch product has brought new challenges.
To telepresence, for example, is really an innovative network technology to the network of personnel, location and work and life events in interconnect together to provide the unique experience of face to face, but the system in use will have a continuous constant data packet, it will be the majority of the current network Router And the switch is difficult to handle.
Good performance in the existing network, the router may not be used for new applications such as telepresence. The problem here is the web designer does not carefully consider the application brought by the constant high-bandwidth requirements. The data in the normal Communicate Process, when the routers and switches, slightly behind the growth of data communications traffic suddenly when the next batch of generally returning to normal. However, the network really is not intermittent, it is during the meeting provided a constant demand.
Telepresence communications traffic packet size is varied. Some systems use a standard for video stream data packets, some systems use smaller packets. However, even using the standard packet traffic flows, will also mixed with a lot of small data packets do not regulate. In addition to video, there is the use of small data packets of audio streams, and to separate data and presentation separate video stream. These factors gave telepresence system, data transmission challenges.
Traditional routers and switches can not meet the current needs of network applications, users and the intelligent network bandwidth demand is increasing, while those to promote the application of the high-end network devices brings opportunities. Today, corporate and campus networks, the University of multimedia network teaching, digital libraries, high-definition video conferencing systems and other applications continue to expand, enterprises and campus backbone to withstand the pressure of escalating from the original Fast Ethernet to the later Gigabit network, today will quickly transition to Gigabit network. Construction of high-speed links using 10GE network, enterprise network backbone link and the link between the Division and the Division can achieve end-to-Ethernet access, thereby improving transmission efficiency, to provide users with services such as multimedia, data flow content, SAN and other services. Gigabit Ethernet devices with high bandwidth, low latency, network management friendly features, is ideal for enterprise and campus backbone network construction.
Next three concerns Ethernet technology are decided by the needs of network applications, in order to quality to meet user demand for bandwidth Ethernet, Gigabit Ethernet technology has also conducted a number of technical innovations.
Gigabit Ethernet physical layer using simplified SDH frame structure, with OC-192c carry, transmission rate of 9.95 3G b / s, providing "end to end" network service assurance. When the backbone links when using Gigabit Ethernet, VLAN information can be easily transmitted end to end.
The same time, Gigabit Ethernet MAC layer protocol without the use of conflict probe, only two stations to support full-duplex point to point transmission of data. Thus, the full-duplex link is not packet conflict, link from the decision by the fiber diameter rather than the Ethernet collision domains. That is, full duplex mode of principle arising from the restriction does not limit the link distance of only transmission characteristics and physical media. I am an expert from China Crafts Suppliers, usually analyzes all kind of industries situation, such as metal hanging basket , aluminum rocking chairs.
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