CCNA640-802 V13题库试题分析20(艾迪飞吴老师讲解)

冷血

<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'">．</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">A <SPAN style="mso-spacerun: yes">&nbsp;</SPAN>routing protocol is required that supports: <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><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">1) routing update authentication<o:p></o:p></FONT></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">2) an addressing scheme that conserves IP addresses<o:p></o:p></FONT></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">3) multiple vendors<o:p></o:p></FONT></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">4) a network with over 50 routers<o:p></o:p></FONT></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">Which routing protocol fulfills these requirements?<o:p></o:p></FONT></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">A. RIPv1<o:p></o:p></FONT></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">B. RIPv2<o:p></o:p></FONT></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">C. EIGRP<o:p></o:p></FONT></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">D. OSPF<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 13.3pt; 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：首先</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">RIPv1</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'">是不支持认证的，因此答案</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">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'">我们可以排除。</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'">是支持多厂商的，因此是一个开放的标准的协议，可以排除</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">EIGPR</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'">，因为这是个</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">CISCO</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'">私有的协议。</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'">网络的大小可以超过</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">50</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'">台路由器，那</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">RIPv2</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'">就不满足了，因为</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">RIP</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'">最大支持</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">16</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'">跳。</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'">那么答案就是</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">OSPF</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'">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"><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: 14.65pt; 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">When a new trunk is configured on a 2950 switch, which VLANs by default are allowed over the trunk link?<o:p></o:p></FONT></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">A. no VLANs <o:p></o:p></FONT></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">B. all VLANs<o:p></o:p></FONT></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">C. only VLANs 1 - 64 <o:p></o:p></FONT></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">D. only the VLANs that are specified when creating the trunk<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">Answer: B<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：</SPAN><SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"><FONT face="Times New Roman">Trunk</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'">上默认是可以转发所有</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'">的数据的。</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"><o:p><FONT face="Times New Roman">&nbsp;

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时光

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