在本文中针对以太网的业务层提出一种帧结构——用与适宜以太城域网。
This document provides architectural framework to model the Ethernet Services Layer-ETH Layer- of MEF compliant Metro Ethernet Networks (MENs).
一项叫做光以太网的新技术开始使城域网(MAN)发生变革。
A new technology called Optical Ethernet is beginning to revolutionize metropolitan-area networks (MAN).
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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