Why is consistency in speed and stability critical for the core layer of networks?

Consistency in speed and stability within the core layer of networks is essential because core networks serve as the backbone for transmitting data between various network segments and devices. The core layer is responsible for aggregating traffic from multiple access networks and then forwarding this data efficiently to its destination.

Real-time applications, such as video conferencing, online gaming, and VoIP services, require a reliable and continuous flow of data with minimal latency. Fluctuations in speed or stability can cause interruptions, delays, and quality degradation in these applications, leading to user dissatisfaction. Therefore, maintaining consistent performance enables these applications to function optimally, ensuring smooth and uninterrupted communication.

While the other choices may address important aspects of network management, such as operational cost reduction, troubleshooting facilitation, or redundancy, they do not capture the critical need for performance consistency that directly impacts real-time applications.