18-2 ATM 异步传输模式(Asynchronous Transfer Mode,ATM 是由ATM论坛设计的信元中继(cell relay)协议，并 被ITU-T采纳. Topics discussed in this section: 设计目标Design Goals 问题Problems 体系结构Architecture 交换Switching ATM层ATM Layers 18.11 18.11 18-2 ATM 异步传输模式 (Asynchronous Transfer Mode, ATM) 是由ATM论坛设计的信元中继(cell relay)协议，并 被ITU-T采纳. 设计目标 Design Goals 问题 Problems 体系结构 Architecture 交换 Switching ATM层 ATM Layers Topics discussed in this section: