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[学习交流] CCNA640-802 V13题库试题分析30(艾迪飞吴老师讲解) [复制链接]

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发表于 2007-12-13 16:52:18 |显示全部楼层
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt"><FONT face="Times New Roman"><SPAN lang=EN-US style="mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 10.5pt"><SPAN style="mso-list: Ignore">1.<SPAN style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt">Refer to the exhibit.<SPAN style="mso-spacerun: yes">&nbsp; </SPAN><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; 1q.jpg (9.66 KB, 下载次数: 18) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">The partial frame shown in the exhibit displays select header information as it arrives at the destination host. <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Which graphic represents the correct header information in the responding frame returned to the remote host?<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; 1ab.jpg (19.6 KB, 下载次数: 18) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p> 1cde.jpg (31.03 KB, 下载次数: 17) </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12.65pt; TEXT-ALIGN: left; mso-line-height-rule: exactly; mso-layout-grid-align: none" align=left><SPAN lang=EN-US style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">Answer: D<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解释一下:当远端的设备收到发往他的数据包时,他需要对收到的报文做一个回复,这时他回复的报文中的源地址和目的地址中的内容跟他收到的报文正好相反,以前的源地址现在都变成目的地址了,以前的目的地址现在都变为源地址了。还有端口号也必须是相反的,以前的源端口号现在变为目的端口号了,以前的目的端口号现在变为源端口号了。包中的字段</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">ACK</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示确认位,而</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SYN</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">代表同步。在</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">TCP/IP</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可靠传输中需要有一个三次握手的过程来建立可靠的连接。步骤如下:</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.发送站向接收站发出一个同步(</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SYN=i</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">)消息,表明发送站想要建立一个可靠的连接。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.接收站以确认消息</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">(ack=i+1)</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和同步消息</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">(syn=j)</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为应答。确认表明成功地收到发送站的同步消息,而接收站的同步消息表明可以建立一个连接。这些消息和起来称为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SYN/ACK</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。他们被一同发送于同一数据传输过程中。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.收到</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SYN/ACK</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">后,发送站以一个确认</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">(ack=j+1)</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为应答。这向接收站表明发送站收到了接收站的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SYN</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,并且表明此刻连接已经完成。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">这样结合上面的说明应该明白了接收站回复的包文中的内容了。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 18.65pt; TEXT-ALIGN: left; mso-line-height-rule: exactly; mso-layout-grid-align: none" align=left><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.</SPAN><SPAN lang=EN-US style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">. In order to complete a basic switch configuration, drag each switch IOS command on the left to its purpose on the right.<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; 2q.jpg (39.76 KB, 下载次数: 19) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Answer: </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman"><o:p> 2a.jpg (36.73 KB, 下载次数: 21) </o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解释一下:</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">debug</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">命令是在特权模式下的命令,而</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">enable</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">命令是从用户模式进入特权模式的。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在全局配置模式下的命令是影响整个系统的命令,而</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">congfigure terminal</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">命令是从特权模式进入全局配置模式的。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Hostname</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用于定义设备的名字。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Interface vlan 1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用于为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">vlan</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">配置</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">SVI</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接口。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">No shutdown</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用于控制交换机的端口状态,使端口打开。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Ip address</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用于为接口配置地址。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Ip default-gateway</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用于指定默认的网关。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 12.65pt; TEXT-ALIGN: left; mso-line-height-rule: exactly; mso-layout-grid-align: none" align=left><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.</SPAN><SPAN lang=EN-US style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">Refer to the exhibit. After HostA pings HostB, which entry will be in the ARP cache of HostA to support this transmission?<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; 3q.jpg (39.84 KB, 下载次数: 16) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman"></FONT></o:p></SPAN>&nbsp;</P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p> 3abcd.jpg (47.7 KB, 下载次数: 17) </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p> 3ef.jpg (24.32 KB, 下载次数: 17) </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Answer: D<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解释一下:虽然说</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Host A ping Host B,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">但是因为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Host A</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指定的默认网关为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Router 1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">fa0/0</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">IP</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; 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"><FONT face="Times New Roman">192.168.6.1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。所以他发包的目的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">ip</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址仍然为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.6.1,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">目的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">mac</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Router 1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">f0/0</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">mac</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; 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 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">4</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Which two topologies are using the correct type of twisted-pair cables? (Choose two.)<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; Q4ab.jpg (24.5 KB, 下载次数: 18) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p> Q42.jpg (37.41 KB, 下载次数: 19) </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 20pt; TEXT-ALIGN: left; mso-line-height-rule: exactly; mso-layout-grid-align: none" align=left><SPAN lang=EN-US style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><FONT face="Times New Roman">Answer: D E<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解释一下:相同设备相连使用交叉线,不同设备相连使用直连线,做配置时使用反序线。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以交换机之间相连使用交叉线,但是路由器和</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">PC</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">相连我们也使用交叉线。这个也需要记住。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">5</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">.</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman"> LAB<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p><FONT face="Times New Roman">&nbsp; 5q.jpg (36.99 KB, 下载次数: 21) </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"><SPAN lang=EN-US style="COLOR: black; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt">Answer:</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"> </SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p> 5a.jpg (37.09 KB, 下载次数: 18) </o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解释一下:</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">先来计算主机最多的网段需要的地址空间,</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">66</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个主机,因此需要的地址范围为大于或等于</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">68</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的,根据</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">2<SUP>n</SUP>≥68 </FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">得到</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">n=7,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以主机位为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">7</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,网络位就为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">25</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。就可以判断出分配给</SPAN><SPAN style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman"> <SPAN lang=EN-US>Inkjet Fa0/0</SPAN></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">IP</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.151.30/25<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">再来判断有</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">60</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">台主机的网段,需要的地址范围是大于或等于</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">62</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的,根据</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">2<SUP>n</SUP>≥62,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">得到</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">n=6,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以主机位为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">6</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,网络位就为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">26</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。就可以判断出分配给</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Laser Fa0/0</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">IP</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.151.149/26<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">7</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">台主机的网段需要的地址空间为大于或等于</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">9</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的,根据</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">2<SUP>n</SUP>≥9</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,得到</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">n=4,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所以主机位为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">4</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,网络位为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">28</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。就可以判断出分配给</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Spooler Fa0/0</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的地址为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.151.249/28.<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">路由器</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Spooler</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Laser</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间只需要有两个主机地址就行了,所以掩码位数为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">30</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。然后根据左边提供的地址条可以判断</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.151.224</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是一个网络地址。所以</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">192.168.151.225/30</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">才是可以使用的主机地址。</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><o:p></o:p></SPAN></P>

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发表于 2007-12-13 21:14:33 |显示全部楼层
哈哈,抢到沙发了.

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发表于 2007-12-13 21:18:13 |显示全部楼层
你抢沙发,那我坐板凳好了~~~

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发表于 2007-12-14 09:25:47 |显示全部楼层
<IMG alt="" src="http://bbs.edify.com.cn/images/smilies/default/smile.gif" border=0 smilieid="1">&nbsp;<IMG alt="" src="http://bbs.edify.com.cn/images/smilies/default/smile.gif" border=0 smilieid="1"> <IMG alt="" src="http://bbs.edify.com.cn/images/smilies/default/smile.gif" border=0 smilieid="1"> 顶

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    发表于 2007-12-14 09:26:52 |显示全部楼层
    我板凳都没得坐的了
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    发表于 2007-12-14 12:37:02 |显示全部楼层
    ding 一个  呵呵

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    发表于 2007-12-17 19:42:33 |显示全部楼层

    回复 1# 的帖子

    支持

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    发表于 2008-3-10 16:10:44 |显示全部楼层

    dddddddddddddddddddd

    ddddddddddddddddddddddddddddddd<br>

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    发表于 2008-4-25 11:41:04 |显示全部楼层
    dddddddddddddddddddddd

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    发表于 2008-6-28 16:50:27 |显示全部楼层

    Ding

    DingDingDingDingDingDing

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    发表于 2008-6-28 16:50:45 |显示全部楼层

    Ding

    DingDingDingDingDingDing

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    发表于 2008-6-28 18:10:34 |显示全部楼层
    <P>吴老师:</P>
    <P>分析30 中的 第五题。 我觉得答案也许有问题。 7主机本应借4个主机位,但题目中给了ip subnet-zero 该命令允许使用0网段,则借3个主机位可以解决问题。所以,我认为答案应为 192。168。151。239/29</P>
    <P>&nbsp;</P>
    <P>请指正</P>
    <P>&nbsp;</P>
    <P>Jack</P>
    <P><SPAN style="PADDING-RIGHT: 0pt; DISPLAY: inline; PADDING-LEFT: 0pt; PADDING-BOTTOM: 0pt; COLOR: black; PADDING-TOP: 0pt; BACKGROUND-COLOR: yellow"></SPAN>&nbsp;</P>
    <P><SPAN style="PADDING-RIGHT: 0pt; DISPLAY: inline; PADDING-LEFT: 0pt; PADDING-BOTTOM: 0pt; COLOR: black; PADDING-TOP: 0pt; BACKGROUND-COLOR: yellow"></SPAN>&nbsp;</P>

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    发表于 2008-11-14 10:28:48 |显示全部楼层
    吴老师,继续顶你

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    发表于 2008-12-26 17:59:14 |显示全部楼层
    的当当当当顶顶顶当当当当

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    发表于 2009-1-8 16:49:30 |显示全部楼层

    ddddddddddddd

    dddddddddddddddddddddddd

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    发表于 2009-1-21 13:50:37 |显示全部楼层
    <P><FONT style="BACKGROUND-COLOR: #f6f2e8">想怎么样怎么样吧</FONT></P>

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    发表于 2009-2-9 15:22:17 |显示全部楼层
    ddddddddddddd

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    发表于 2009-2-18 07:04:33 |显示全部楼层
    有中文的解釋會比較好了解

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    发表于 2009-4-2 17:06:59 |显示全部楼层
    感谢老师的讲解!!

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