What does ingress in a broadband network refer to?

Ingress in a broadband network specifically refers to unwanted signals or interference that enters the network from external sources. This can occur due to various factors, such as poor shielding, inadequate grounding, or external electromagnetic interference. When ingress happens, it can disrupt the intended data flow within the network, leading to issues like reduced performance or signal quality.

The other choices describe different concepts within networking. The exit of signals from the network pertains to egress, which is the opposite of ingress. Signals generated within the network would refer to normal operational signals that are intended for transmission, while the measured loss of digital signals, typically associated with attenuation, deals with the degradation of signal quality over distance or through various mediums. These concepts help clarify that ingress specifically highlights the challenge of maintaining signal purity in the presence of external interferences.