虚电路示例 DCE DCE DTE DCE DCE DCE DTE Source DCE Destination o There is connection establishment before transmission o Packets can arrive the destination through the same path o There is connection release after finishing transmissionThere is connection establishment before transmission Packets can arrive the destination through the same path. There is connection release after finishing transmission DTE DCE DCE DTE DCE DCE DCE DCE Source Destination 虚电路示例