[This is preliminary documentation and subject to change.]
The Announcement Listener system service comprises a number of components that operate together to capture, filter, and process broadcast data.
The primary Announcement Listener system service adheres to the IDataListener interface. It runs constantly unless explicitly disabled or halted by the user, receiving announcements from sockets on well-known Internet Protocol (IP) address and port pairs, passing those announcements to its installed filters, and scheduling the receipt of any announcements that a filter selects.