What is one of the main functions of the Data Over Cable Service Interface Specification (DOCSIS)?

The Data Over Cable Service Interface Specification (DOCSIS) primarily serves to ensure the reliable and efficient delivery of broadband data over cable television systems. One of its key functions is to support high downlink speeds, particularly up to 1.2 Gbps in the latest versions. This capability allows for significant data throughput, making it suitable for modern internet demands, such as streaming, gaming, and large file downloads.

While other options may touch on relevant aspects of network performance and management, they do not capture the primary role of DOCSIS as effectively as this function. For instance, the specification is not designed to limit bandwidth usage; rather, it facilitates higher bandwidth utilization. Similarly, it does not exclusively focus on uplink speeds nor does it primarily manage security protocols, although these elements are certainly part of the broader ecosystem of data transmission over cable networks.