Chapter 17, Problem 17.1E

Explanation of Solution

Scalability:

Scalability is nothing but an attribute that has the ability to grow and administer increased demand in an organization or network or software.

In other words, when the network, system, software or an organization is ready to handle,

• Influx of demand
• Increased productivity
• Changing trends

Differences between scaling up and scaling out with respect to scalability:

Scaling up	Scaling out
It is the process of replacing resources in the system with more powerful resources	It is the process of adding new resources to an existing system.
It is also called as concurrent programming.	It is also called as distributed programming.
It is costlier than scaling out.	It is cost effective.
Example: If the computer runs out of resources, it is not necessary to make changes with the computer instead, the memory can be increased.	Example: Adding extra web server in order to work along with the existing one.