\begin{thebibliography}{1}

\bibitem{rfc2543}
M.~Handley, H.~Schulzrinne, E.~Schooler, and J.~Rosenberg, ``{SIP:} session
  initiation protocol,'' Request for Comments 2543, Internet Engineering Task
  Force, Mar. 1999.

\bibitem{rfc2119}
S.~Bradner, ``Key words for use in {RFCs} to indicate requirement levels,''
  Request for Comments 2119, Internet Engineering Task Force, Mar. 1997.

\bibitem{draft-ietf-sip-dhcp}
G.~Nair and H.~Schulzrinne, ``{DHCP} option for {SIP} servers,'' {Internet
  Draft}, Internet Engineering Task Force, Apr. 2000.
\newblock Work in progress.

\bibitem{rfc2782}
A.~Gulbrandsen, P.~Vixie, and L.~Esibov, ``A {DNS} {RR} for specifying the
  location of services {(DNS} {SRV)},'' Request for Comments 2782, Internet
  Engineering Task Force, Feb. 2000.

\bibitem{rfc1035}
P.~V. Mockapetris, ``Domain names - implementation and specification,'' Request
  for Comments 1035, Internet Engineering Task Force, Nov. 1987.

\end{thebibliography}
