Zero Configuration Networking: The Definitive Guide

4.7. Summary

DNS Service Discovery using Multicast DNS provides a simple, efficient, lightweight way to discover what services of a given type are available to you on the local network. Next, Chapter 5 shows how DNS Service Discovery using Unicast DNS takes the same elegant, simple concepts and scales literally to the entire planet, using the existing hierarchy of DNS servers that's already in place and well understood at just about all large companies, universities, and other similar organizations around the world.