📄 dos下的网络编程.mht
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-family:NSimSun'>物理层<span lang=3DEN-=
US><o:p></o:p></span></span></p>
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<div>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
lang=3DEN-US style=3D'color:fuchsia'>Socket</span><span style=3D'font-=
family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"=
Times New Roman";
color:fuchsia'>接口</span><span lang=3DEN-US style=3D'colo=
r:fuchsia'><o:p></o:p></span></p>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-family:NSimSun'>应用层<span lang=3DEN=
-US><o:p></o:p></span></span></p>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-family:NSimSun'>传输层<span lang=3DEN=
-US><o:p></o:p></span></span></p>
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<div>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
lang=3DEN-US style=3D'font-family:NSimSun'>Internet</span><span
style=3D'font-family:NSimSun'>层<span lang=3DEN-US><o:p></o:p><=
/span></span></p>
</div>
<![if !mso]></td>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
lang=3DEN-US style=3D'font-family:NSimSun'>Telnet|FTP|HTTP|SMTP|POP3|=
DNS|RIP|SNMP<o:p></o:p></span></p>
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<p class=3DMsoNormal style=3D'text-indent:52.5pt;mso-char-indent-coun=
t:5.0'><span
lang=3DEN-US style=3D'font-family:NSimSun'>TCP<span
style=3D'mso-spacerun:yes'> =
</span>|<span style=3D'mso-spacerun:yes'>
</span>UDP<o:p></o:p></span></p>
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<p class=3DMsoNormal><span lang=3DEN-US style=3D'font-family:NSimSun'=
>ARP
|<span
style=3D'mso-spacerun:yes'> =
</span>IP<span
style=3D'mso-spacerun:yes'> =
</span>| IGMP | ICMP<o:p></o:p></span></p>
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<p class=3DMsoNormal><span lang=3DEN-US style=3D'font-family:NSimSun'=
>Ethernet
| Token Ring | Frame Relay | ATM<o:p></o:p></span></p>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-family:NSimSun'>网络访问层=
;<span
lang=3DEN-US><o:p></o:p></span></span></p>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
lang=3DEN-US style=3D'font-family:NSimSun;color:#3366FF'>TCP/IP</span=
><span
style=3D'font-family:NSimSun;color:#3366FF'>模型<span
lang=3DEN-US><o:p></o:p></span></span></p>
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<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-family:NSimSun;color:#3366FF'>各层次&=
#19978;的协议<span
lang=3DEN-US><o:p></o:p></span></span></p>
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span
lang=3DEN-US style=3D'font-size:12.0pt;line-height:125%;font-family:NSimSun=
'><o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'line-height:125%'><span lang=3DEN-US style=3D=
'font-size:
12.0pt;line-height:125%;font-family:NSimSun'><o:p> </o:p></span></p>
<h3 style=3D'line-height:125%'><span lang=3DEN-US style=3D'font-family:NSim=
Sun'>2 IP</span><span
style=3D'font-family:NSimSun'>地址和端口<span
lang=3DEN-US><o:p></o:p></span></span></h3>
<p class=3DMsoNormal style=3D'line-height:125%'><span style=3D'font-size:12=
.0pt;
line-height:125%;font-family:NSimSun'>在使用<span lang=3D=
EN-US>TCP</span>和<span
lang=3DEN-US>UDP</span>协议通信时，=
517;须同时指定<span
lang=3DEN-US>IP</span>地址和端口号û=
65;能完整地标识一个通=
信地址，在编程中通=
4120;将这两个参数一起ऩ=
0;义在一个<span
lang=3DEN-US>sockaddr_in</span>结构中来使=
992;。<span
lang=3DEN-US><o:p></o:p></span></span></p>
<p class=3DMsoNormal style=3D'line-height:125%'><span lang=3DEN-US style=3D=
'font-size:
12.0pt;line-height:125%;font-family:NSimSun'>struct sockaddr_in <o:p></o:p>=
</span></p>
<p class=3DMsoNormal style=3D'line-height:125%'><span lang=3DEN-US style=3D=
'font-size:
12.0pt;line-height:125%;font-family:NSimSun'>{<o:p></o:p></span></p>
<p class=3DMsoNormal style=3D'line-height:125%'><span lang=3DEN-US style=3D=
'font-size:
12.0pt;line-height:125%;font-family:NSimSun'><span
style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </span>short <span
style=3D'mso-spacerun:yes'> =
</span>sin_family;<span
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