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城域网的建设在国内已是如火如茶,万兆以太网的问世,使城域网建设又多了一种优秀的选择。以太网在局域网中是一统天下的技术。在过去,由于传输距离、带宽等因素的限制,以太网往往被认为只适合在局域网中使用。但近年来,千兆以太网技术的出现使人们看到了一丝曙光。千兆以太网不仅在带宽上较前有了突破,而且在标准中对传输距离作了不同的划分,如:支持100米传输距离的铜线版本、支持550米的中距离版本、支持5公里的长
The construction of metropolitan area network is like a fire in the country, the advent of 10 Gigabit Ethernet makes metropolitan area network construction an extra good choice. Ethernet in the LAN is unified world technology. In the past, due to transmission distance, bandwidth and other factors, Ethernet is often considered only suitable for use in the local area network. However, in recent years, the advent of Gigabit Ethernet technology has seen a glimmer of hope. Gigabit Ethernet is not only a breakthrough in the bandwidth earlier, but also in the standard transmission distance made a different division, such as: support for copper transmission distance of 100 meters, 550 meters to support the mid-range version, support for 5 km Long