Define the following network scenarios:

a) Isolated machine

b) Small local network(4 machines, 1 gateway)

c) 2 segmented local networks (2 groups of 2 machines and one router each and a general gateway).

d) 2 interconnected local networks ( 2 groups of 2 machines + a gateway each).

e) 2 machine connected through a private virtual network. indicate the advantages/disadvantages of each configuration, for which types of infrastructure they are appropriate and which important parameters are needed.