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四千兆位以太网上的QoS及其与ATM比较在九十年代中后期,应用突出表现了对网络连接的带宽、延迟和抖动等需求。这类应用包括在LAN和WAN上的音频和视频传输,组广播(multicasting)等等。它们需要网络提供高服务质量(QoS)的集成服务。然而,千兆位以太网仅提供高速的连接,但不由其自身提供QoS的完备集合,自动冗错恢复,或高层路由服务,这些能够通过其他开放标准提供。千兆位以太网象所有以太网规范那样,规定了OSI协议模型的物理层和数据链路层,而TCP/IP规定了高层协议,允许在应用之间可靠的通信服务。千兆位以太网可以支持与IP共同工作的资源预留协议(RSVP),以及
QoS over Four Gigabit Ethernet and Comparison with ATM In the mid-to-late 1990s, applications highlighted the need for bandwidth, latency and jitter for network connections. Such applications include audio and video transmission over LAN and WAN, multicasting, and more. They need the network to provide high quality of service (QoS) integration services. However, gigabit Ethernet provides only high-speed connectivity but does not provide a complete set of QoS, automatic redundancy recovery, or high-level routing services, which can be offered through other open standards. Gigabit Ethernet, like all Ethernet specifications, specifies the physical and data link layers of the OSI protocol model, while TCP / IP specifies high-level protocols that allow reliable communication services between applications. Gigabit Ethernet can support resource reservation protocols (RSVP) that work with IP and