We gardeners know better. Not only do individual tomato growers lay out their plots differently, but their choices of support vary as well. 6-foot mesh fencing lashed to those green metal fence posts you can buy at the lumber yard or the farm supply store. As the plants grow, they can climb the fence, secured by twine or long twist ties supplied, and periodically moved, by the gardener. I've also seen tomato plants climbing fences improvised using twine webbed between upright supports, although I've questioned the stability of such an arrangement particularly given the violent winds that often accompany spring and summer storms in this part of the country.
Some gardeners stake individual tomato plants, either in rows or in squares.
They also have to tie the plants to the stakes and move the ties as the plants grow. Many gardeners, myself included, use cages for support. There's no twine or twist ties to mess with and all you have to do is move the branches up the cage. The rule on cages is the sturdier, the better. The 5-inch square holes are large enough to pick tomatoes through and the wire is sturdy enough to support the weight of a tomato plant growing out of the top of the cage.