(With the emergence of agile Ethernet, Gigabit Ethernet and even 10 Gigabit Ethernet, as well as the advancement of optical fiber technology, Ethernet of various rates can not only constitute a local area network, but also a metropolitan area network and a wide area network. It is a reasonable, effective and cost-effective method to construct a broadband access network with various rates of Ethernet, and the generalized wiring system provides a guarantee for the implementation of the broadband access network and becomes the cornerstone of the Ethernet broadband access network.)
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