for services in a domain. This is a two-step process, consisting of
\term{Service Instance Enumeration} and \term{Service Instance Resolution}.
-%\todo{XMPP is a probably not the best example here, use IPP instead}
-%\begin{subfigure} \end{subfigure} \begin{figure}[top] \centering
-%\includegraphics[width=0.9\textwidth]{fig-dnssd-mock.jpg} \caption{DNS-SD:
-%Service Instance Enumeration and Resolution} \label{fig:dnssd} \end{figure}
\paragraph{1. Service Instance Enumeration} At first, to enumerate the available
services in a domain for a given protocol, a DNS-SD-enabled client queries
PTR resources of the form \code{\_service.\_proto.domain}. The result of