Final answer:
The device used for protection at the connection between a cable assembly or wire bundle and a connector is known as a strain relief boot or cable strain relief, critical in applications like endoscopes.
Step-by-step explanation:
The device used to cover or protect the exposed-wire access area between the rear of a connector and the end of the bundle braid on cable assemblies or wire bundles is called a strain relief boot or cable strain relief. This component is important to provide protection from bending or tension that could cause damage to the cable or its connection. For instance, in medical applications such as endoscopes, which are used to explore the body through various orifices or minor incisions, durable and flexible strain relief is essential to ensure the device functions correctly without damaging the internal fiber bundles that transmit light for illumination and imaging.