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GE,意为千兆以太网技术,它是近年来推出的1000Mbps高速以太网,属于高速宽带IP网络技术。由于千兆以太网仍保留着许多以太网的技术特点,但其速率比快速以太网提高了十倍,所以能很好地解决日益增多的用户业务对宽带的需求。它的出现在局域网或城域网组网技术上形成了与ATM竞争的格局。 相似文献
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千兆以太网与ATM之间的对抗赛对于千兆比特以太网的应用前景,不同人有不同的说法。有人认为,千兆比特以太网将是联网的最终方案;另有人认为,关于千兆比特以太网性能的宣传有些言过其实;还有人认为,它会对现有的高速技术构成严重的威胁。ATM设备的生产厂家肯定... 相似文献
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千兆比以太网是一种新型高速局域网 ,它可以提供 1Gbit的通信带宽 ,采用和传统 10兆比、10 0兆比以太网同样的CSMA/CD协议、帧格式和帧尺寸 ,因此可以实现在原有低速以太网基础上平滑、连续的网络升级 ,从而能最大限度的保护用户以前的投资。文章简要介绍了千兆比以太网出现的背景 ,然后详细阐述了与其相关的实现技术及其特性 ,最后介绍了其应用和发展前景。 相似文献
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千兆比以太网是一种新型的高速网络,在网络管理等方面与现有的以太网技术一致,并采用新技术确保干线速率提高带来网络性能的改善,因此是现有以太网升级的一个最好途径。经过一年多的讨论千兆经以太网即将通过IEEE标准并在骨干网上成为ATM的有力竞争者。 相似文献
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各种新的带宽增强型应用促使人们对网络提出了更高的要求,千兆比以太网以其优秀的网络性能脱颖而出。本文介绍了IEE802.3z千兆比以太网标准以及它与其它技术结合的优势,最后通过实例说明了网络如何升级到千兆比以太网的过程。 相似文献
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随着以太网通信技术的发展,局域网子网间的通信业务增长迅速,而适用于子网间数据通信的传统路由器因为其转发速度慢、用户配置复杂等缺点,难以满足当前大量跨子网以及虚拟局域网之间通信数据量的需求。基于片上系统(System-on-Chip, SoC)平台FMQL45T900型号的FPGA芯片,采用VHDL硬件描述语言,自主研发了12端口的千兆以太网三层交换功能,并已在相应的硬件平台上进行了功能验证和性能测试。实验结果表明,基于固定长度链表的哈希查找方式实现简单、查找高效、复杂度低,该研究成果可在某些需要进行数据灵活交换的特殊的场景下进行应用。 相似文献
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以太网相关技术标准规范与标准组织简介(二) 总被引:1,自引:0,他引:1
中首先介绍电气与电子工程师学会(IEEE)组织概况,然后概括说明了IEEE关于局域网/城域网IEEE802.2标准系列、以太网集成电路标准图标,特别着重讨论了关于以太网的IEEE802.3系列标准、在SDH/WDM网络上传输以太网帧信号的相关规范和10吉比特以太网技术标准。最后指出,10吉比特以太网技术标准的开发和广泛应用将在通信领域展现出更加辉煌的明天。 相似文献
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以太网相关技术标准规范与标准组织简介(一) 总被引:2,自引:0,他引:2
中首先介绍电气与电子工程9币学会(IEEE)组织概况,然后概括说明了IEEE关于局域网/城域网IEEE802.2标准系列、以太网集成电路标准图标,特别着重讨论了关于以太网的IEEE802.3系列标准、在SDH/WDM网络上传输以太网帧信号的相关规范和lO吉比特以太网技术标准。最后指出,10吉比特以太网技术标准的开发和广泛应用将在通信领域展现出更加辉煌的明天。 相似文献
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We propose an extension of the classical CSMA/CD protocol that eliminates its three main drawbacks. The new protocol, called dual‐mode CSMA/CD (CSMA/DM), operates in two modes, light mode and heavy mode. The light mode of CSMA/DM is almost the same as the original CSMA/CD protocol and is primarily used when the LAN load is light. The heavy mode is a collision free mode and is applied when the LAN load is heavy. The proposed modification to CSMA/CD is minimal while performance gain is significant. CSMA/DM automatically switches between its two modes based on the observed LAN load. Under heavy mode, the monitor station in a CSMA/DM LAN allocates bandwidth to those busy stations without collisions. The newly added priority scheme in the heavy mode allows stations to reserve bandwidth for their high priority frames. Compared with the current collision‐free fast Ethernet and Gigabit Ethernet, CSMA/DM has the advantage of not needing any extra switches or hubs while maintaining comparable performance. Its priority scheme provides more flexibility on bandwidth distribution than in fast Ethernet and Gigabit Ethernet. It can also be easily adapted for high‐speed wireless LANs. More importantly, CSMA/DM should be a good alternative of the widely used CSMA/CA (collision avoidance) in mobile ad hoc networks (MANET) and sensor networks. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
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提出一种通过在星型耦合器的网络侧插入光纤布喇格光栅 ,在用户侧增加一个远端转发单元的方法 ,将CSMA/CD用作多址接入协议的半双工EPON接入方案。理论分析与仿真实验表明其性能与 10 0BASE T局域网相当。该方案实现简单 ,成本低廉 ,与现有以太网的体系结构兼容。 相似文献
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DECnet Area 2, a local area network (LAN) that is part of Digital Equipment's worldwide Easynet, is described. It is comprised of several baseband Ethernet segments connected by local Ethernet repeaters and standard LAN Bridge 100 devices, which extend a LAN. Measurements carried out to determine whether the capacity of the Ethernet had been reached or exceeded are discussed. The measurements showed that the bandwidth was not reached or exceeded. They also showed that the measured traffic load and the numbers of devices connected to the Ethernet did not pose traffic throughput problems to the user community. In addition, it was found that a larger LAN configuration could be achieved by using Ethernet bridges and taking advantage of address filtering, which distributes and thus reduces traffic loads on specific segments 相似文献
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《Communications Magazine, IEEE》2009,47(3):S30-S38
Carrier-grade Ethernet is the latest step in the three-decade development of Ethernet. This work describes the evolution of Ethernet technology from LAN toward a carrier-grade operation through an overview of recent enhancements. After reviewing native Ethernet and its transport shortcomings, we introduce the major carrier-grade upgrades. We first discuss the evolution of layer-2 architectures. Then, we detail the service specifications and their QoS and traffic engineering requirements. Finally, we describe the new OAM and resilience mechanisms. 相似文献