Which statement is true for data centers?

Data centers are complex environments that utilize various technologies and configurations to achieve optimal performance and reliability. The statement that all options are true highlights key aspects of modern data center design and architecture.

First, having a fully connected topology in a data center does indeed enhance host-to-host capacity. This architecture reduces latency and increases the bandwidth available for inter-host communication, which is crucial for applications that require high levels of data transfer.

The use of blade servers interconnected via a Top of Rack (TOR) switch is also accurate. Blade servers are designed for high density and efficient use of space, and TOR switches facilitate the networking of these blades while minimizing cable clutter, thereby improving overall network performance and manageability.

Lastly, the ability to perform hardware maintenance without interrupting software applications is a pivotal feature of modern data centers. Techniques such as hot swapping, where components can be replaced without shutting down the entire system, allow for continuous operation and enhanced uptime for critical applications.

Together, these statements reflect the advanced capabilities and design considerations of contemporary data centers, confirming that all the provided statements are indeed true.