What is vertical and horizontal scalability?

Related questions

1. What is scalable model?
2. What is scalability testing with example?
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5. What is scalable growth?
6. What is scalability in web application?
7. How is scalability achieved?
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10. What do you mean by scalability?

Tags

1. #adding
2. #means
3. #machine
4. #resources
5. #machines
6. #whereas
7. #horizontal
8. #vertical
9. #existing
10. #scaling
11. #scale
12. #power