General conclusion
Electrical and optical link performances comparison

It is difficult to draw an overall conclusion about the different transmission media and communication techniques, as there are many constraints and compromises to consider. The table 6 lists the main advantages and disadvantages to be taken into account when choosing a communication device. The boxes marked with a (−) indicate the disadvantages of the domains and online communication techniques in relation to the columns, while the boxes marked with a (+) indicate the advantages of the domains and techniques in the columns in relation to the rows.