Can the concept of connectivity between system components be described and why is it important?

Coupling between system components is the degree of dependency and interaction between them. The higher the coupling, the more the components depend on each other.

It is important to maintain low coupling to:

• Facilitate system maintenance and development
• Simplify testing and component replacement
• Increase flexibility and scalability of the architecture

For example, if two modules are strongly coupled, a change in one may require changing the other, which complicates maintenance. Using interfaces and clear contracts helps reduce coupling.