CCNA官方思科模拟器Packet_Tracer(PT)中文使用教程及实验教程,内含CCNA官方思科模拟器Packet_Tracer(PT)中文使用说明书.pdf，Cisco_Packet_Tracer_5.5中文教程.doc，交换机配置基础.ppt等(The official CCNA Cisco the simulator Packet_Tracer (PT) Chinese using the tutorial and experimental tutorial)