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随着业务IP化的加速发展,电信网络承载的业务类型发生了根本性变化,分组化已经成为传送网络最为重要的特征之一。以太网由于其简单易用和低成本,已经成为宽带接入的重要手段,并且
With the accelerated development of service IP, the types of services carried by telecommunications networks have undergone fundamental changes. Packetization has become one of the most important features of transport networks. Ethernet has become an important means of broadband access due to its ease of use and low cost, and