Regression Methods
Classically, regression is used for binary classification given that it divides a space into two regions: true or false.
One-vs-Rest
The one-vs-rest method performs regression for possible data labels. After that, the predicted label is the label with the highest probability among all possible data labels.

Drawback: classifications must be performed for labels. Therefore, binary classifiers must be trained.
One-vs-One
Each class is compared with every other individually. It contains more details than the one-vs-rest approach due to its nature of pair-wise comparison.

Drawback: If classes are used, binary classifiers.