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<H1 ALIGN=CENTER>
<CENTER>
<FONT SIZE=6 COLOR="#FF0000"><B>— Appendix D —</B>
<BR><B>Well-Known Port Numbers</B></FONT></CENTER></H1>
<BR>
<P>Both TCP and UDP use well-known ports, also known as <I>service contact </I><I>ports.</I> The port names reflect the specific TCP and UDP applications. Ports are the end points of a connection, providing a convenient method for accessing and addressing the connection end.
<BR>
<P>The following list does not include all TCP and UDP ports, but it does include all those you are likely to encounter. The rest are assigned for historical or experimental reasons.
<BR>
<BR>
<CENTER><TABLE BORDERCOLOR=#000040 BORDER=1 CELLSPACING=2 CELLPADDING=3 >
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P><B><I>Port</I></B>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P><B><I>Name</I></B>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P><B><I>Description</I></B>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>1
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>TCPMUX
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>TCP Port Service Multiplexer
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>5
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>RJE
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Remote Job Entry
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>7
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>ECHO
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Echo
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>9
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>DISCARD
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Discard
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>11
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>USERS
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Active Users
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>13
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>DAYTIME
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Daytime
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>17
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Quote
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Quote of the Day
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>19
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>CHARGEN
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Character Generator
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>20
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>FTP-DATA
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>File Transfer (Data Channel)
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>21
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>FTP
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>File Transfer (Control Channel)
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>23
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>TELNET
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>TELNET
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>25
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>SMTP
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Simple Mail Transfer
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>27
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>NSW-FE
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>NSW User System FE
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>29
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>MSG-ICP
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>MSG-ICP
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>31
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>MSG-AUTH
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>MSG Authentication
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>33
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>DSP
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Display Support Protocol
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>35
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080><BR></FONT>
</TD>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Private Printer Server
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>37
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>TIME
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Time
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>39
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>RLP
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Resource Location Protocol
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>41
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>GRAPHICS
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Graphics
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>42
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>NAMESERVER
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Host Name Server
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>43
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>NICNAME
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Who Is
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>49
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>LOGIN
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Login Host Protocol
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>53
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>DOMAIN
<BR>
</FONT>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>Domain Name Server
<BR>
</FONT>
<TR>
<TD BGCOLOR=#80FFFF ><FONT COLOR=#000080>
<P>67
<BR>
</FONT>
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