What does power line redundancy ensure in a cloud provider's infrastructure?

Power line redundancy in a cloud provider's infrastructure is primarily aimed at ensuring continuous power supply to data centers and critical infrastructure components. This redundancy typically involves having multiple power sources, circuits, or power lines so that if one power source fails, the others can take over seamlessly, maintaining power availability.

The correct answer highlights the aspect of replicating communication lines, which is essential for ensuring that there are multiple paths for power delivery. With replicated power lines, the infrastructure can avoid a single point of failure that could disrupt operations or cause downtime. This indirectly ties into the broader concept of power line redundancy, as communication along these lines must also be reliable and uninterrupted for the infrastructure to function effectively.

The other options, while related to general operational reliability or capacity, do not directly capture the essence of what power line redundancy specifically ensures within the context of the cloud provider's infrastructure. Backup power supplies being always active refers more to uninterruptible power supplies (UPS) or generator systems rather than redundancy in power lines. Minimization of server downtime is a desirable outcome of power line redundancy but not an exclusive concept related to it. Increased data storage capacity is not relevant to power line redundancy at all, as it pertains to storage solutions rather than power delivery mechanisms.