What does network scalability refer to?

Network scalability refers to the capability of a network to grow and expand without experiencing performance degradation or issues. This concept is crucial in the design and management of networks because it ensures that as the number of users, devices, or services increases—whether through additional hardware, increased traffic, or expanded geographical coverage—the network can handle these changes efficiently.

When a network is designed with scalability in mind, it allows for the integration of new technologies, easier addition of resources, and seamless adaptation to changing demands. This means that businesses can expand their network infrastructure according to their needs without significant modifications that could disrupt existing services or lead to poor performance.

Considering the other options, the first implies that scalability only pertains to hardware upgrades, which ignores the broader aspects of network growth. The third suggests a limitation instead of an expansion capability, and the fourth incorrectly narrows scalability to the use of static IP addresses, which is only one small aspect of network design and management. These aspects underscore the importance of scalability as a comprehensive quality of the network rather than a narrow or limited feature.