mDNS文档说明

MDNS is a protocol that resolves host names to IP addresses or Service name to IP address with layer4 type with port in local network that do not include a local name server. It is a zero configuration service, using essentially the same programming interfaces, packet formats and operating semantics as the unicast Domain Name System (DNS). The mDNS protocol is published as RFC 6762, uses IP multicast User Datagram Protocol (UDP) packets with 224.0.0.251 and port 5353.