\chapter*{Requests for Comments}

\name{Requests for Comments} are documents that propose or define Internet standards or best practices. They are controlled by the \name{Internet Engeneering Task Force} (short: \NAME{IETF}) and can be found on their website: {\small\url{http://ietf.org}}\,.

A particular \RFC\ is located at {\small\url{http://tools.ietf.org/rfc/rfcNNNN.txt}}\,, where ``\texttt{NNNN}'' is the four-digit number of that \RFC. For example is \RFC\,821 located at {\small\url{http://tools.ietf.org/rfc/rfc0821.txt}}\,.

More comfortable to browse are the \NAME{HTML} formated representations which contain navigation hyperlinks. They are accessable at {\small\url{http://tools.ietf.org/html/rfcNNNN}}\,.

Following is a list of \RFC{}s which are relevant for this thesis.

\begin{description}
\item[\RFC\,821]
\emph{Simple Mail Transfer Protocol} (obsoleted by \RFC\,2821)

\item[\RFC\,822]
\emph{Standard for the format of \NAME{ARPA} Internet text messages} (obsoleted by \RFC\,2822)

\item[\RFC\,0000]
\emph{}


\end{description}