[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fahGbqBddl0GWY5j2yRm1W42BCMeV8EIlir_4uTuqdqM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-05-21 14:05:15",145037936,[8,9,10,11],"中继器","集线器","路由器","网桥",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},66,"c1c6182a6c4f1fdcca4e334c71cd7c3b","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","计算机网络技术","work_34874091","四、 网络互联及Internet","在一种网络中,超过一定长度,传输介质中的数据信号就会衰减.如果需要比较长的传输距离,就需要安装 ( )设备",[21,32,38,47,53,59,62,67,73,82],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],145037931,[25,26,27,28],"物理层","网络层","应用层","数据链路层","路由器是用于哪一层的设备( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":37,"source":30,"type":31},[],145037932,[36,10,11,8],"转换器","在不同网络之间实现分组的存贮和转发,并在网络层提供协议转换的网络互连器称为( )",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":30,"type":31},[],145037933,[42,43,44,45],"模拟信号的放大","数字信号的整形","模拟信号与数字信号的转换","数字信号的编码","调制解调器( MODEM )的主要功能是( )(单选题)",{"answer":48,"createTime":5,"id":49,"options":50,"question":52,"source":30,"type":31},[],145037934,[25,26,28,51],"传输层","网桥工作在 ( )",{"answer":54,"createTime":5,"id":55,"options":56,"question":58,"source":30,"type":31},[],145037935,[28,26,57,25],"对话层","网桥是在( )上实现不同网络的互连设备",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":66,"source":30,"type":31},[],145037937,[8,9,10,11],"当两种相同类型但又使用不同通信协议的网络进行互联时,就需要使用 ( )",{"answer":68,"createTime":5,"id":69,"options":70,"question":72,"source":30,"type":31},[],145037938,[8,9,10,71],"网关","当连接两个完全不同结构的网络时,必须使用( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":30,"type":31},[],145037939,[77,78,79,80],"易辨认","使电磁射和外部电磁干扰减到最小","加快数据传输速度","便于与网络设备连接","双绞线是成对线的扭绞旨在 ( )",{"answer":83,"createTime":5,"id":84,"options":85,"question":90,"source":30,"type":31},[],145037940,[86,87,88,89],"数据链路层和网络层","网络层和传输层","传输层和数据链路层","物理层和网络层","网卡和路由器分别运行于OSI模型的( )"]