-SRV~\cite{rfc2782} and PTR in a way that allows hosts to browse
-for services in a domain. This is a two-step process, consisting of
+SRV~\cite{rfc2782} and PTR~\cite{rfc1035} in a way that allows hosts to browse
+for services in a domain. While SRV records specify the location of services on
+a host, PTR records hold a reverse mapping from IP address to host name.
+DNS-SD now relies on a two-step process, consisting of