What is the difference between vertical scaling and horizontal scaling?
- A. They are the same approach
- B. Vertical scaling adds more machines; horizontal scaling adds more power to existing machines
- C. Horizontal scaling is only for databases
- D. Vertical scaling increases the power of an existing machine; horizontal scaling adds more machines to distribute the load
✅ Correct Answer: D. Vertical scaling increases the power of an existing machine; horizontal scaling adds more machines to distribute the load