\catcode`@=11
\expandafter\ifx\csname graph\endcsname\relax \alloc@4\box\chardef\insc@unt\graph\fi
\catcode`@=12
\setbox\graph=\vtop{%
  \baselineskip=0pt \lineskip=0pt \lineskiplimit=0pt
  \vbox to0pt{\hbox{%
    \special{pn 8}%
    \special{pn 20}%
    \special{pa 0 500}%
    \special{pa 0 0}%
    \special{pa 750 0}%
    \special{pa 750 500}%
    \special{pa 0 500}%
    \special{fp}%
    \rlap{\kern  0.375in\lower 0.291in\hbox to 0pt{\hss \xx RFC1006\hss}}%
    \special{pa 0 1000}%
    \special{pa 0 500}%
    \special{pa 750 500}%
    \special{pa 750 1000}%
    \special{pa 0 1000}%
    \special{fp}%
    \rlap{\kern  0.375in\lower 0.708in\hbox to 0pt{\hss TCP\hss}}%
    \rlap{\kern  0.375in\lower 0.874in\hbox to 0pt{\hss IP\hss}}%
    \kern  0.751in
  }\vss}%
  \kern  1.001in
}