Define Scalability.

• A. Indicated how easily the network can accommodate more users and data transmission requirements as they increase
• B. The weather impact on fiber optic cabling
• C. The security level of data
• D. The number of routers required

Answer: (A)

Scalability is a network's ability to grow to meet rising demand—adding more users, devices, and higher data rates—without sacrificing performance. This is why the best description is that it indicates how easily the network can accommodate more users and data transmission requirements as they increase. In practice, a scalable design uses modular hardware, scalable protocols, and techniques like load balancing or virtualization so capacity can be expanded with minimal disruption. The other ideas—weather effects on fiber, the security level of data, or simply the number of routers—don’t capture the growth-focused aspect of scaling.