In addition, a 1:1 link protection mechanism is designed, which needs introduce a link selection sublayer between MAC silent layer and MAC layer (or optional MAC Control sublayer),and it can provide fast protection for Ethernet WAN through redundant link.
该保护机制是要在MAC客户层和MAC层(或者可选的MAC控制子层)之间引入链路选择子层,通过提供冗余链路的方式为广域以太网提供快速保护。
参考来源 - 以太网交换及应用技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
设备供应商称，广域以太网的成本只有同步光缆网的五分之一或者A TM的十分之一。
Equipment vendors are saying Ethernet in the wide area may have as little as one-fifth the cost of SONET and one-tenth the cost of ATM.
供应商有极大的兴趣，正在使下一代以太网标准――10千兆位以太网准备好用于广域网。
There is enough interest that vendors have been trying to make the next Ethernet standard, 10-Gigabit Ethernet, ready for the WAN.
现在，千兆位以太网已用于一些城域网（man），标准机构正在为大城市网、甚至广域网制定10千。
Now, Gigabit Ethernet is being used in some metropolitan-area networks (MAN), and standards bodies are readying 10-Gigabit Ethernet for metropolitan and even WANs.
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