Introduction: We know that when the characteristic impedance of the line is discontinuous, the signal will be reflected through the discontinuous point, causing the signal to overshoot and ring. When
I guess many people have almost forgotten about Ethernet half-duplex. Believe it or not, we have recently started using Ethernet half-duplex. In the final analysis, it is to save costs. Due to the sim
[size=5]DAO layer: The DAO layer is mainly responsible for the work of the data persistence layer. Some tasks responsible for communicating with the database are encapsulated here. The design of the D