From where do DOCSIS modems receive their configuration files and messages?

DOCSIS modems receive their configuration files and messages from the Cable Modem Termination System (CMTS). The CMTS functions as a centralized hub within the cable operator's network that communicates with multiple downstream cable modems. It provides the necessary configuration parameters that enable the modem to operate correctly on the network. This setup allows the CMTS to manage connections, distribute updates, and ensure that each modem is configured appropriately for the services the user subscribes to.

In the context of this question, the CMTS plays a critical role in ensuring that modems can access the correct configuration files necessary for establishing and maintaining a reliable Internet connection. The other options do not accurately describe how DOCSIS modems receive their configurations, as they either reference sources that do not play a role in this specific process or misidentify the function of those sources. Thus, the CMTS is the correct entity responsible for communicating configuration details to DOCSIS modems.