中国钟学我术大草 信息网倍与协议 VERIITY OF SCIENCE AND TECHNOLOOY O年C框NA ATM: 网络 Data Data 1 AAL AAL ATM Switch ATM Switch ATM ATM ATM ATM PHY PHY PHY PHY L...t ←一 End system一← Network →←-End system→信息网络与协议 ATM:网络 AAL ATM Data Data AAL ATM PHY PHY ATM PHY ATM PHY … End system Network End system ATM Switch ATM Switch