【摘要】 系统地介绍了以太网的基本概念、介质接入控制和物理层准规范,以太网信号的帧结构,网络的硬件设备,网络的组成及主要性能,以及以太网信号在PDH、SDH/SONET中的传输等等。本部分主要介绍以太网路由器的分类、配置、结构与发展趋势,以及路由器与中继器、网桥、交换机设备的比较。更多还原

【Abstract】 The paper systematically introduces the basic concept of Ethernet,Ethernet media access contrrol,physical layer performance standard,Ethernet signal frame structure,network hardware equipment ,network contitution and main performances and Ethernet signal transmitted over PDH,SDH/SONET,et al.This part mainly introduces the classification,configuration,construction and development trend for router of Ether - net and makes the comparison among the equipments of repeater,bridges,exchanges,and router.更多还原