Translation of "reflector" into English

A filter driver at the top of the kernel-mode device stack that facilitates communication between the kernel-mode device stack and all the user-mode driver framework drivers on the system.

A program that sends messages to a number of users upon receipt of a signal from a single user. A common type of reflector is an e-mail reflector, which forwards any e-mail sent to it to the multiple recipients currently on its list.