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<p class=MsoNormal align=center style='text-align:center'><span
lang=EN-US>IP Header</span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal align=center style='text-align:center'><span
lang=EN-US>TCP Header</span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal align=center style='text-align:center'><span
lang=EN-US>Data</span></p>
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<p class=MsoNormal align=center style='text-align:center'><span
lang=EN-US>CRC</span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>一連串流的<span class=GramE>以太幀頭</span>、</span><span
lang=EN-US>TCP/IP</span><span style='font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>包頭都相同。</span></p>
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<p class=MsoNormal><span style='font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>路由的結果，也應該完全相同。</span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>目標</span><span
lang=EN-US style='font-size:9.0pt'>MAC:R<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>源</span><span
lang=EN-US style='font-size:9.0pt'>MAC:B<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>目標端口</span><span
lang=EN-US style='font-size:9.0pt'>:2000<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>源端口</span><span
lang=EN-US style='font-size:9.0pt'>:21<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>目標</span><span
lang=EN-US style='font-size:9.0pt'>IP:192.168.1.1<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:宋體;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>源</span><span
lang=EN-US style='font-size:9.0pt'>IP:192.168.2.1<o:p></o:p></span></p>
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<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:12.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";color:red'>加速</span></b><b
style='mso-bidi-font-weight:normal'><span lang=EN-US style='font-size:12.0pt;
color:red'>VLAN</span></b><b style='mso-bidi-font-weight:normal'><span
style='font-size:12.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";color:red'>間路由的機制</span></b><b
style='mso-bidi-font-weight:normal'><span lang=EN-US style='font-size:12.0pt;
color:red'><o:p></o:p></span></b></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>接下來，讓我們具體考慮一下該如何使用三層交換機進行高速</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>VLAN</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>間路由。</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>首先，整個流的第一塊數據，照常由交換機轉發</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt;mso-bidi-font-weight:bold'>→</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>路由器路由</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt;mso-bidi-font-weight:bold'>→</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";mso-bidi-font-weight:bold'>再次由交換機轉發到目標所連端口。這時，<span
style='color:blue'>將第一塊數據路由的結果記錄到緩存里保存下來</span>。需要記錄的信息有：</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt;mso-bidi-font-weight:bold'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;mso-pagination:widow-orphan'><span
lang=EN-US style='mso-bidi-font-size:10.5pt;mso-bidi-font-weight:bold'><o:p> </o:p></span></p>
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tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
10.5pt;font-family:Wingdings;mso-fareast-font-family:Wingdings;mso-bidi-font-family:
Wingdings'><span style='mso-list:Ignore'>l<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>目標</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>IP</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>地址</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:21.0pt;text-align:left;
text-indent:-21.0pt;mso-pagination:widow-orphan;mso-list:l3 level1 lfo10;
tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
10.5pt;font-family:Wingdings;mso-fareast-font-family:Wingdings;mso-bidi-font-family:
Wingdings'><span style='mso-list:Ignore'>l<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>源</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>IP</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>地址</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:21.0pt;text-align:left;
text-indent:-21.0pt;mso-pagination:widow-orphan;mso-list:l3 level1 lfo10;
tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
10.5pt;font-family:Wingdings;mso-fareast-font-family:Wingdings;mso-bidi-font-family:
Wingdings'><span style='mso-list:Ignore'>l<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>目標</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>TCP/UDP</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>端口號</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:21.0pt;text-align:left;
text-indent:-21.0pt;mso-pagination:widow-orphan;mso-list:l3 level1 lfo10;
tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
10.5pt;font-family:Wingdings;mso-fareast-font-family:Wingdings;mso-bidi-font-family:
Wingdings'><span style='mso-list:Ignore'>l<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>源</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>TCP/UDP</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋體;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>端口號</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='margin-left:21.0pt;text-align:left;
text-indent:-21.0pt;mso-pagination:widow-orphan;mso-list:l3 level1 lfo10;
tab-stops:list 21.0pt'><![if !supportLists]><span lang=EN-US style='mso-bidi-font-size:
10.5pt;font-family:Wingdings;mso-fareast-font-family:Wingdings;mso-bidi-font-family:
Wingdings'><span style='mso-list:Ignore'>l<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='mso-bidi-font-size:10.5pt;
font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>接收端口號（交換機）</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'><o:p></o:p></span></p>
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