一、短距离链接技术的发展众所周知 ,设备间的信息传递是通过连线实现的 ,设备越多 ,所需连线就越多 ,这些电缆纵横交错 ,给人们带来不便。随着科技的发展 ,为了减少设备间的连线 ,人们发明了只用一条线缆来连接多个外围设备的ＵＳＢ接口技术 ,而且还将ＩｒＤａ红外传输技术广 First, the development of short-distance link technology As we all know, the transmission of information between devices is achieved through the connection, the more equipment, the more connections required, these cables criss-crossing, causing inconvenience to people. With the development of science and technology, in order to reduce the connection between devices, people have invented the USB interface technology which uses only one cable to connect multiple peripheral devices, and also has widened the IrDa infrared transmission technology