Which type of network do we use in our homes while connecting a computer system and peripheral device like a printer?

Pepsi company has its corporate office in one part of the city while the production unit is in another part of the same city. Which type of network is most suitable for communication between both the units?

Raman is travelling by train and has to complete an urgent client assignment. Which wireless media should he use to send the file to his client?

Your Uncle has five offices in different cities. He wants to connect his computers via networking at various offices. Which type of networking will you suggest him to go for?