Is it possible to select a certain type of entry that displays different sections to fill out?

For example, when filling in WAN details, and i selected "leased line" it will show me one set of information to fill out and then when i select "SoGEA" it shows me another.

I guess this can sort of be done with not making any of the sections "required", but when i want users to fill in a required section for "leased line" i don't want that to be available for "SoGEA"