Which of the following are correct statements about Horizontal and Vertical scaling? Group of answer choices Horizontal scaling is also called "scaling out," and Vertical scaling is known as "scaling up." Horizontal scaling refers to adding more nodes and machines, whereas Vertical scaling is about adding more resources to an existing server. Horizontal scaling refers to adding more resources to an existing server, whereas Vertical scaling is about adding more nodes and machines. Horizontal and Vertical scaling both are the same terms