试题出自试卷《H12-831真题（九）》

A

<p>如果网络中交换机频繁删除mac地址表，很有可能是收到了大量的tc-bpdu报文，可以在设备上开启防tc-bpdu攻击来避免该现象出现。<br>因此答案选A<br></p><p> </p><p><link rel="File-List" href="file:///C:/Users/joinlabs/AppData/Local/Temp/msohtmlclip1/01/clip_filelist.xml"><link rel="themeData" href="file:///C:/Users/joinlabs/AppData/Local/Temp/msohtmlclip1/01/clip_themedata.thmx"> <link rel="colorSchemeMapping" href="file:///C:/Users/joinlabs/AppData/Local/Temp/msohtmlclip1/01/clip_colorschememapping.xml"> <!--[if gte mso 9]><xml>  <w:WordDocument>   <w:View>Normal</w:View>   <w:Zoom>0</w:Zoom>   <w:TrackMoves/>   <w:TrackFormatting/>   <w:DoNotShowRevisions/>   <w:DoNotPrintRevisions/>   <w:DoNotShowInsertionsAndDeletions/>   <w:DoNotShowPropertyChanges/>   <w:PunctuationKerning/>   <w:DrawingGridVerticalSpacing>7.8 磅</w:DrawingGridVerticalSpacing>   <w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEvery>   <w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery>   <w:ValidateAgainstSchemas/>   <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>   <w:IgnoreMixedContent>false</w:IgnoreMixedContent>   <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>   <w:DoNotPromoteQF/>   <w:LidThemeOther>EN-US</w:LidThemeOther>   <w:LidThemeAsian>ZH-CN</w:LidThemeAsian>   <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript>   <w:Compatibility>    <w:SpaceForUL/>    <w:BalanceSingleByteDoubleByteWidth/>    <w:DoNotLeaveBackslashAlone/>    <w:ULTrailSpace/>    <w:DoNotExpandShiftReturn/>    <w:AdjustLineHeightInTable/>    <w:BreakWrappedTables/>    <w:SnapToGridInCell/>    <w:WrapTextWithPunct/>    <w:UseAsianBreakRules/>    <w:DontGrowAutofit/>    <w:SplitPgBreakAndParaMark/>    <w:EnableOpenTypeKerning/>    <w:DontFlipMirrorIndents/>    <w:OverrideTableStyleHps/>    <w:UseFELayout/>   </w:Compatibility>   <w:DoNotOptimizeForBrowser/>   <m:mathPr>    <m:mathFont m:val="Cambria Math"/>    <m:brkBin m:val="before"/>    <m:brkBinSub m:val="--"/>    <m:smallFrac m:val="off"/>    <m:dispDef/>    <m:lMargin m:val="0"/>    <m:rMargin m:val="0"/>    <m:defJc m:val="centerGroup"/>    <m:wrapIndent m:val="1440"/>    <m:intLim m:val="subSup"/>    <m:naryLim m:val="undOvr"/>   </m:mathPr></w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml>   </xml><![endif]--> <!--[if gte mso 10]> <![endif]--><span><span lang="EN-US"><o:p></o:p></span></span> </p>