[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBTzvBYDc6TaxXQWYM8OtTrLSNuTr6eoeogVhXUoDtM8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":71},[],"2025-09-06 04:55:33",215628299,[8,9,10,11],"实现域名与 IP 地址的相互映射","类似 "电话簿",帮助网络程序找到目标主机 IP","是互联网的核心服务之一","仅能将域名解析为 IP 地址,无法反向解析",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","9f4718788782458d934f1dee6515118d","4.1.1 DNS服务器基础","以下关于 DNS 服务器功能的描述,正确的有哪些",[21,32,41,50,59,68,72,81,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],215628294,[25,26,27,28],"TCP 协议,端口号 80","TCP 协议,端口号 53","UDP 协议,端口号 53","UDP 协议,端口号 443","DNS 协议运行在以下哪种协议之上,且使用的端口号是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],215628295,[36,37,38,39],""."",""root"",""@"","无特殊符号,默认省略","DNS 域名空间中,根域的表示方式是以下哪一项",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],215628296,[45,46,47,48],"cn(中国)","us(美国)","uk(英国)","edu(教育或学术研究单位)","以下哪类域名属于组织域(依据机构性质划分的顶级域)",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],215628297,[54,55,56,57],"根域","二级域","子域(三级域)","主机名","在完整域名 "www.support.kylinos.com" 中,"kylinos" 属于哪一级域名",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],215628298,[63,64,65,66],"hosts 文件无法记录 IP 地址与主机名的映射","hosts 文件仅支持 Windows 系统,不支持 Linux","hosts 文件只能通过 UDP 协议传输","hosts 文件查找和维护困难,无法满足大规模网络需求","随着网络规模扩大,hosts 文件逐渐被 DNS 取代的主要原因是",{"answer":69,"createTime":5,"id":6,"options":70,"question":19,"source":30,"type":71},[],[8,9,10,11],1,{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":30,"type":71},[],215628300,[76,77,78,79],"根域:整个域名空间的基础,用 "." 表示","顶级域:根域的下一级,含组织域、地理域等","中间域:独立于顶级域和子域的层级","子域:顶级域的下一级(如二级域),可进一步细分","DNS 域名空间的层次结构包含以下哪些层级",{"answer":82,"createTime":83,"id":84,"options":85,"question":87,"source":30,"type":71},[],"2025-09-06 04:55:34",215628301,[45,86,46,47],"com(商业机构)","以下属于地理域(按国家 \u002F 地区划分的顶级域)的有哪些",{"answer":89,"createTime":90,"id":91,"options":92,"question":95,"source":30,"type":96},[],"2025-10-15 00:01:32",221365629,[93,94],"正确","错误","全球共有 13 组根域名服务器,共同维护根域名信息,实际使用中根域 "." 通常会省略",3,{"answer":98,"createTime":90,"id":99,"options":100,"question":101,"source":30,"type":96},[],221365630,[93,94],"在域名 "ftp.example.com" 中,"ftp" 是二级域,"example" 是主机名,用于标识具体服务类型"]