Good job, so far. Thank you.
On a machine with multiple network interfaces (ethernet, wlan, mobile broadband) a service is pulished with a- and aaaa-records for all IP adresses on any interface.
RFC 6762, Chapter 14. Considerations for Multiple Interfaces states:
Except in the case of proxying and other similar specialized uses,
addresses in IPv4 or IPv6 address records in Multicast DNS responses
MUST be valid for use on the interface on which the response is being
sent.
Service.prototype._records
There should be a configurable filter or a separation by interface/IP address.