From 241348c434976798798de035debe725cf8a2a72e Mon Sep 17 00:00:00 2001
From: Roland Hieber <rohieb@rohieb.name>
Date: Wed, 15 Jan 2014 02:23:15 +0100
Subject: [PATCH] reviewer #1 wants citation for PTR records and short
 explanation

---
 biblio.bib             | 15 ++++++++++++++-
 sec-dns-extensions.tex |  9 ++++++---
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/biblio.bib b/biblio.bib
index 2a4c8ed..da088bb 100644
--- a/biblio.bib
+++ b/biblio.bib
@@ -272,6 +272,19 @@
   organization="Internet Engineering Task Force",
   year=1997,
   month=mar,
-    note="Updated by RFCs 3396, 4361, 5494, 6842",
   url="http://www.ietf.org/rfc/rfc2131.txt",
 }
+
+@misc{rfc1035,
+  author="P.V. Mockapetris",
+  title="{Domain names - implementation and specification}",
+  series="Request for Comments",
+  number="1035",
+  howpublished="RFC 1035 (INTERNET STANDARD)",
+  publisher="IETF",
+  organization="Internet Engineering Task Force",
+  year=1987,
+  month=nov,
+  url="http://www.ietf.org/rfc/rfc1035.txt",
+}
+
diff --git a/sec-dns-extensions.tex b/sec-dns-extensions.tex
index 86bc75c..e266ba6 100644
--- a/sec-dns-extensions.tex
+++ b/sec-dns-extensions.tex
@@ -26,7 +26,8 @@ If a host receives a query and knows about the queried resource, it responds to
 querying host with a standard DNS response. The querying host can then simply
 finish and use the result, or wait until other hosts respond to its query. The
 latter is typically the case when a record can have multiple values, as it is
-the case with \code{SRV} and \code{PTR} records.
+the case with \code{SRV} and \code{PTR} records (which will be discussed in the
+next section).
 
 Another feature of Multicast DNS is the reduction of traffic through
 \term{Known-Answer Suppression}. It allows a querying host to specify already
@@ -43,8 +44,10 @@ the network of new services available on a host.
 
 As another recent extension for the Domain Name System, \term{DNS-Based Service
 Discovery (DNS-SD)}~\cite{rfc6763} uses DNS records of types
-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
 \term{Service Instance Enumeration} and \term{Service Instance Resolution}.
 
 \paragraph{1. Service Instance Enumeration} At first, to enumerate the available
-- 
2.20.1