‘Information is wealth’. Today from womb to tomb (from birth to death) everywhere information is needed. In olden days , homing pigeon acted as a messenger and transfer the message from one place to another . It is wonderful that pigeon finds exactly the route using earth’s electromagnetic field. Actually it is under research how pigeon finds the route.
Human race has been inventing amazing things. In these, invention of semi conductor is one of the greatest breakthroughs in the science and technology. Then PNDiode, BJT, MOSFET, CMOS, GATES, Processors etc.. From this, there are several departments spawned such as Electronics engineering, Signal Processing, Computer Science , Networks , Telecommunication etc . In modern world all are integrated. One of the interesting subjects we can discuss is computer networks. Anyone can communicate to anyone in this world at low cost provided both ends should have communication facilities (internet). How many of us really thought about how our messages are reaching the destination ? how complex the technology which helps us communicate. We will see more on this..