2.2.4.2 Broadcast Lookup
A master locator broadcasts a request for information by using the Remote Mailslot Protocol when it receives a query as specified in section 3.4.1.5.1:
This request MUST be sent over the mailslot by using the QueryPacket structure specified in section 2.2.4.2.1.
Server locators MUST respond to the request with the QueryReply structure specified in section 2.2.4.2.2.