What is telecommunication?
The act of transferring data and information at a far distance for communication is called telecommunication.
Computer network reduces the expenses of offices.
A computer network is the interconnection of computers to share the data, files, hardware, software, and so on. It also makes the communication and transmission reliable In the offices, the files should be transferred from one to other branches very often. Also, the software and hardware can be shared which reduces the cost of buying many items of hardware, software, and so on. So, computer network reduces expenses of offices.