Optical Networks consist of fibre optical cables.
These have a huge transmitting capacity.
Today 9.6 Gbit/s are possible.
When using WDM (wavelength division multiplex), the capacity theoretical multiplies up to Tbit/s!
The problem is, that the electronical switching of data with such huge data rates is quite difficult and costly.
Therefore so called by-passing (i.e. forwarding data without electronical switching) should be used. One way to do that, is a coupling or switched network.
Click the "continue" button and watch how it works!