[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fuMSAVLoWz2J4pwUjtDAR1vziYMTgqMvuN6CDT1UupN0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-05-22 22:23:25",24842472,[8,9,10,11],"双绞线","细缆","光纤","粗缆",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"43bb48386d080eaa633fb4db032b299b","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5f9a0c3c5e1276a629471db66626796.png","计算机网络技术","04f8a9b3a2e540d9b8aaceef03a6c0b9","第四单元章节测验","下列传输介质中采用RJ-45头制作连接器件的是( )",[21,32,41,49,58,61,70,79,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],24842468,[25,26,27,28],"中继器","放大器","调制解调器","编码译码器","模拟信号采用模拟传输时采用下列哪种设备以提高传输距离( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],24842469,[36,37,38,39],"目前生产的光导纤维,可传输频率范围为1014~1015Hz","由于光纤采用的是光谱技术,所以没有泄漏信号,可以在干扰信号很强的环境中工作","光纤在任何时间都只能单向传输,因此要实行双向通信,心须成对出现","目前常用的光纤大多采用超纯二氧化硅制成,具有很高的性能价格比","下列有关光纤通信的说法不正确的是( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":48,"source":30,"type":31},[],24842470,[8,45,46,47],"同轴电缆","光缆","无线介质","在下列传输介质中,对于单个建筑物内的局域网来说,性能价格比最高的是( )",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":30,"type":31},[],24842471,[53,54,55,56],"热噪声","脉冲噪声","串扰","环境恶劣","数据在传输中产生差错的重要原因是( )",{"answer":59,"createTime":5,"id":6,"options":60,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":30,"type":31},[],24842473,[65,66,67,68],"20Mbps","20MHz","100Mbps","100MHz","5类UTP双绞线规定的最高传输特性是( )",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":30,"type":31},[],24842474,[74,75,76,77],"5m","15m","25m","100m","结构化布线系统中,设计工作区子系统时要注意,从信息插座到设备的双绞线一般不超过( )",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":30,"type":31},[],24842475,[83,84,85,86],"STP","FTP","VTP","UTP","屏蔽双绞线的符号表示为( )",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":30,"type":31},[],24842476,[92,93,94,95],"蓝色、橙色、绿色、紫色","蓝色、红色、绿色、棕色","蓝色、橙色、绿色、棕色","白色、橙色、绿色、棕色","非屏蔽双绞线电缆用色标来区分不同的线对,计算机网络中常用的四对双绞线电缆有四种本色,它们是( )",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":30,"type":31},[],24842477,[101,102,103,104],"垂直干线子系统","水平干线子系统","设备间子系统","管理子系统","配线架主要用于结构化布线系统的( )"]