In oredr to celebrate the Labor Day,we will have three-day holidays,from 30th,April to 2nd,May.On returning from the holiday,we will delivery goods according to scheduled date. With the coming of 1st May,people all over the wold will celebrate Labor Day,however do you know the history of Labor Day?Do you know why we celebrate Labor Day? And  do you know why it is called Labor Day or why May 1...

Repeater (RP repeater) is a connecting device working on the physical layer. It is suitable for interconnecting two identical networks, and its main function is to extend the network transmission distance by retransmitting or forwarding data signals. Repeaters are network devices that regenerate and restore signals: physical layer devices of the OSI model. In the field of communications, a repeate...