What is true about the data broker in NetApp Cloud Sync service?

The data broker in the NetApp Cloud Sync service functions as a key component to manage data synchronization tasks. It is indeed implemented as a node.js application that runs on a Linux host. This design choice allows the data broker to efficiently handle asynchronous operations and manage file transfers between different storage environments in a lightweight and scalable manner.

Using node.js, the data broker can take advantage of non-blocking I/O operations, which enhances performance, especially when managing multiple data synchronization tasks simultaneously. This technology makes it suitable for cloud environments where efficient resource usage and scalability are critical.

In contrast to this, the other aspects mentioned in the question highlight misconceptions. For example, a data broker cannot be an ASP.NET web service on a Windows host since this statement does not align with the architecture used by NetApp Cloud Sync. Additionally, while deduplication of data is a common feature in various data services, the data broker itself does not deduplicate source data before transmission but focuses on facilitating movement to and from cloud data sources and destinations. Lastly, while the data broker does require an internet connection for cloud synchronization, specifying TCP port 8443 aligns with specific application requirements, which may not universally apply to all configurations or services.