What is the focus of signals referred to as downstream?

The focus of signals referred to as downstream is primarily on signals going to the customer premises. In a broadband network, downstream refers to the transmission of data signals from the network's central locations, such as headends or hubs, down to the end user's equipment—typically a modem or router located in the customer's home or business. This directional flow is crucial for ensuring that subscribers can receive content, such as video or internet data, effectively.

Understanding downstream signals is critical for installers because it directly impacts the quality and performance of the services delivered to customers. Installers must ensure that these signals are strong and reliable to provide optimal service.

The other choices do not align with the definition of downstream signals. For instance, signals coming from the fiber node or the main office would typically be associated with upstream signals, which refer to data traveling from the customer's location back to the network. Signals towards the hub may refer to signals in transit but do not capture the essence of what downstream signals represent in the context of service delivery to the end user.