[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjIZUsSKqovnkg4wHPpMYEYc8nzA9Jc4WtBWLt7r8TfI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-06-24 01:28:45",154819301,[8,9,10,11],"128","32","48","64",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},44,"f9d6e389f6d0ad8cbff27053b780150b","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4c491a4bf65856aa9400a6bdf60473f.jpg","计算机网络原理","exam_125330607","数据链路层测试(23信安)","以太网中,MAC地址的长度是",[21,32,41,50,59,68,71,80,87,96],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],154819296,[25,26,27,28],"CSMA","CSMA\u002FCD","CSMA\u002FCA","CDMA","下列选项中,对正确接收到的数据帧进行确认的MAC 协议是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],154819297,[36,37,38,39],"100","1000","10","1","10个站连接在一个100Mb\u002Fs以太网交换机,则每一个站所能得到的带宽是 Mb\u002Fs",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],154819298,[45,46,47,48],"差错检测是通过二进制反码运算计算冗余码,加到帧的尾部的FCS字段,接收方通过该字段检测帧传输过程是否被修改","封装成帧是在IP分组封装成帧时,在帧的首部和尾部加上帧开始符和结束符,以便让接收方通过帧的开始符和结束符,从物理层的比特流正确识别、接收每一个数据帧","差错检测是通过CRC计算冗余码,加到帧的尾部的FCS字段,接收方通过该字段检测帧传输过程是否被修改","透明传输当帧中封装的数据出现和帧开始符、结束符一样的比特组合时,接收方能够识别帧所封装的数据和控制数据,最终正确接收数据帧","数据链路层的三 问题是封装成帧、透明传输和差错检测.有关这三个问题的描述,不正确的是",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],154819299,[54,55,56,57],"无连接","冗余","透明性","面向连接","在数据帧中,当传输的数据中出现控制字符时,就必须采取适当的措施,使接收方不至于将数据误认为是控制信息,这样才能保证数据链路层传输是",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],154819300,[63,64,65,66],"RJ11","AUI","BNC","RJ45","100 BASE-T使用的传输介质的连接头为",{"answer":69,"createTime":5,"id":6,"options":70,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],154819302,[75,76,77,78],"200bit","250bit","100bit","500bit","若10Mbps的CSMA\u002FCD局域网的节点最大距离为 2.5Km ,信号在媒体中的传播速度为2&times; 108m \u002Fs.则该网络的最短帧长为",{"answer":81,"createTime":5,"id":82,"options":83,"question":86,"source":30,"type":31},[],154819303,[84,37,85,36],"200","150","一个快速以太网交换机的端口速率为100Mbit\u002Fs,若该端口可以支持全双工传输数据,那么该端口实际的传输带宽为 Mb\u002Fs",{"answer":88,"createTime":5,"id":89,"options":90,"question":95,"source":30,"type":31},[],154819304,[91,92,93,94],"单播","多播","任播","广播","下列以太网中不能发送的数据帧为",{"answer":97,"createTime":5,"id":98,"options":99,"question":104,"source":30,"type":31},[],154819305,[100,101,102,103],"0&mu;s","0.048&mu;s","121.44&mu;s","5.12&mu;s","对于1000Base-T 以太网交换机,当输出端口无排队,以直通交换方式转发一个以太网帧(不包括前导码)时,引入的转发延迟至少是"]