What information does a DOCSIS 3.1 modem provide in its Bonded Initial Ranging Request (B-INIT-RNG-REQ) message to the CMTS?

The Bonded Initial Ranging Request (B-INIT-RNG-REQ) message is an essential communication from a DOCSIS 3.1 modem to the Cable Modem Termination System (CMTS). This message primarily allows the modem to request bonding channels for improved data transmission.

In the context of DOCSIS 3.1, the information contained in the B-INIT-RNG-REQ specifically includes details about the downstream service group (DS-SG) that the modem is part of, if this information has been determined at that point in time. This detail is crucial for the CMTS to manage resources, allocate channels effectively, and ensure that the modem is correctly integrated into the larger network.

The other options listed, while related to various operational aspects of the modem, do not accurately capture the primary purpose of the B-INIT-RNG-REQ message. Thus, the content of this specific request focuses on establishing the right communication link within the service group context, making option A the correct choice.