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\begin{document}        
 
\begin{enumerate}
 
\item What is the essential idea behind (a) ``server'' and (b) ``client''.
Answer this question as if the Internet were the telephone system, in order
to keep your answer short and direct.
%2000 #1 % a) server "answers the phone" b) client "calls up"
 
a)\hrulefill\_
 
b)\hrulefill\_
 
\item Describe completely the protocol for the date server.
%2000 #2 %listen on port 13 for any input, send it back
 
\_\hrulefill\_
 
\_\hrulefill\_