Less because computers can do almost everything for you . ... Yes it is more efficient because they are making more things that computers and cell phones can do for you.
When the destination are selected by the network then, it makes the connection for transferring the data packets by using physical layer.
As, the physical layer is basically responsible for transmitting the data and reception of the data between the physical medium and device.
The physical layer basically provide the electrical interface during the transmission of data. The physical layer in the network basically provide the hardware elements like cable, ethernet and repeaters.
