From: Roland Hieber Date: Fri, 17 Jan 2014 07:22:39 +0000 (+0100) Subject: dns extensions: slight reformulation X-Git-Tag: final-after-review~2 X-Git-Url: https://git.rohieb.name/skm-ma-ws1314.git/commitdiff_plain/2370df938083d6bd5bfae4716a8a2757ea79d422?hp=9fd9db35d4e21e28704b69e52973a2ace769e28f dns extensions: slight reformulation --- diff --git a/sec-dns-extensions.tex b/sec-dns-extensions.tex index e266ba6..93921fd 100644 --- a/sec-dns-extensions.tex +++ b/sec-dns-extensions.tex @@ -15,12 +15,12 @@ group\footnote{\url{http://zeroconf.org}}. \term{Multicast DNS} (mDNS)~\cite{rfc6762} describes an extension to the Domain Name System that allows DNS resource records to be distributed on multiple hosts in a network, therefore avoiding central authorities and enabling every host to -publish its own entries. For that purpose, a special domain, usually -named \code{.local}, is used. +publish its own entries. For that purpose, a special top-level domain, is used, +usually named \code{.local}, which contains those entries. Software that supports mDNS listens on the reserved link-local multicast address \code{224.0.0.251} (for IPv4 queries) or -\code{FF02::FB} (for IPv6 queries) on UDP port 5353 for incoming queries. +\code{ff02::fb} (for IPv6 queries) on UDP port 5353 for incoming queries. Queries sent to those multicast address and port are standard DNS queries. If a host receives a query and knows about the queried resource, it responds to the querying host with a standard DNS response. The querying host can then simply @@ -32,7 +32,7 @@ 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 known resources in its query when querying resources that could exist on more -than one host (e.~g., SRV records). The hosts matching those resources then do +than one host (e.\,g., SRV records). The hosts matching those resources then do not generate a response, thus reducing the messages in the network and saving bandwidth, which is usually a scarce resource in wireless networks.