Why is it necessary to have a common language for communication across devices?

What will be an ideal response?

This speaks to the need for Ethernet and why it became so popular; without it you would have to define the communication structure between any two devices that connect.Ethernet provided a way to allow a computer to speak not only to another computer but also to printers, fax machines, and other electronic devices.The idea was extended beyond a single network, allowing an Ethernet frame to be easily ported from one network to another.