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[
{
"question": "在Shell 脚本中，用来读取文件内各个域的内容并将其赋值给Shell 变量的命令是 （） 。",
"choices": [
"fold",
"join",
"tr",
"read"
],
"answer": "D",
"solution": "",
"id": "pufa-3",
"A": "fold",
"B": "join",
"C": "tr",
"D": "read"
},
{
"question": "退出交互模式的shell，应键入 （） 。",
"choices": [
";",
"^q",
"exit",
"quit"
],
"answer": "C",
"solution": "",
"id": "pufa-4",
"A": ";",
"B": "^q",
"C": "exit",
"D": "quit"
},
{
"question": "下列变量名中有效的shell 变量名是：（）",
"choices": [
"-2-time",
"_2$3",
"trust_no_1",
"2004file"
],
"answer": "C",
"solution": "",
"id": "pufa-5",
"A": "-2-time",
"B": "_2$3",
"C": "trust_no_1",
"D": "2004file"
},
{
"question": "是shell 具有的功能和特点的是（）。",
"choices": [
"管道",
"输入输出重定向",
"执行后台进程",
"处理程序命令"
],
"answer": "C",
"solution": "",
"id": "pufa-6",
"A": "管道",
"B": "输入输出重定向",
"C": "执行后台进程",
"D": "处理程序命令"
},
{
"question": "下列对shell 变量FRUIT 操作，正确的是：（） 。",
"choices": [
"为变量赋值：$FRUIT=apple",
"显示变量的值：fruit=apple",
"显示变量的值：echo $FRUIT",
"判断变量是否有值：[ -f ―$FRUIT‖ ]"
],
"answer": "C",
"solution": "",
"id": "pufa-7",
"A": "为变量赋值：$FRUIT=apple",
"B": "显示变量的值：fruit=apple",
"C": "显示变量的值：echo $FRUIT",
"D": "判断变量是否有值：[ -f ―$FRUIT‖ ]"
},
{
"question": "下面的网络协议中，面向连接的的协议是：()",
"choices": [
"传输控制协议",
"用户数据报协议",
"网际协议",
"网际控制报文协议"
],
"answer": "A",
"solution": "",
"id": "pufa-8",
"A": "传输控制协议",
"B": "用户数据报协议",
"C": "网际协议",
"D": "网际控制报文协议"
},
{
"question": "一台主机要实现通过局域网与另一个局域网通信，需要做的工作是 () 。",
"choices": [
"配置域名服务器",
"定义一条本机指向所在网络的路由",
"定义一条本机指向所在网络网关的路由",
"定义一条本机指向目标网络网关的路由"
],
"answer": "C",
"solution": "",
"id": "pufa-9",
"A": "配置域名服务器",
"B": "定义一条本机指向所在网络的路由",
"C": "定义一条本机指向所在网络网关的路由",
"D": "定义一条本机指向目标网络网关的路由"
},
{
"question": "在/etc/fstab 文件中指定的文件系统加载参数中，() 参数一般用于CD-ROM 等移动设备。",
"choices": [
"defaults",
"sw",
"rw 和ro",
"noauto"
],
"A": "defaults",
"B": "sw",
"C": "rw 和ro",
"D": "noauto",
"answer": "D",
"solution": "",
"id": "pufa-10"
},
{
"question": "终止一个前台进程可能用到的命令和操作 () 。",
"choices": [
"kill",
";+C",
"shut down",
"halt"
],
"A": "kill",
"B": ";+C",
"C": "shut down",
"D": "halt",
"answer": "B",
"solution": "",
"id": "pufa-11"
},
{
"question": "在使用mkdir 命令创建新的目录时，在其父目录不存在时先创建父目录的选项是 ()",
"choices": [
"-m",
"-d",
"-f",
"–p"
],
"A": "-m",
"B": "-d",
"C": "-f",
"D": "–p",
"answer": "D",
"solution": "",
"id": "pufa-12"
},
{
"question": "具有很多C 语言的功能，又称过滤器的是 () 。",
"choices": [
"csh",
"tcsh",
"awk",
"sed"
],
"A": "csh",
"B": "tcsh",
"C": "awk",
"D": "sed",
"answer": "C",
"solution": "",
"id": "pufa-13"
},
{
"question": "建立动态路由需要用到的文件有 () 。",
"choices": [
"/etc/hosts",
"/etc/HOSTNAME",
"/etc/resolv.conf",
"/etc/gateways"
],
"A": "/etc/hosts",
"B": "/etc/HOSTNAME",
"C": "/etc/resolv.conf",
"D": "/etc/gateways",
"answer": "D",
"solution": "",
"id": "pufa-14"
},
{
"question": "局域网的网络地址192.168.1.0/24，局域网络连接其它网络的网关地址是192.168.1.1。主机192.168.1.20 访问172.16.1.0/24 网络时，其路由设置正确的是 () 。",
"choices": [
"route add –net 192.168.1.0 gw 192.168.1.1 netmask 255.255.255.0 metric1",
"route add –net 172.16.1.0 gw 192.168.1.1 netmask 255.255.255.255 metric1",
"route add –net 172.16.1.0 gw 172.16.1.1 netmask 255.255.255.0 metric 1",
"route add default 192.168.1.0 netmask 172.168.1.1 metric 1"
],
"A": "route add –net 192.168.1.0 gw 192.168.1.1 netmask 255.255.255.0 metric1",
"B": "route add –net 172.16.1.0 gw 192.168.1.1 netmask 255.255.255.255 metric1",
"C": "route add –net 172.16.1.0 gw 172.16.1.1 netmask 255.255.255.0 metric 1",
"D": "route add default 192.168.1.0 netmask 172.168.1.1 metric 1",
"answer": "B",
"solution": "",
"id": "pufa-15"
},
{
"question": "下列提法中，不属于ifconfig 命令作用范围的是 () 。",
"choices": [
"配置本地回环地址",
"配置网卡的IP 地址",
"激活网络适配器",
"加载网卡到内核中"
],
"A": "配置本地回环地址",
"B": "配置网卡的IP 地址",
"C": "激活网络适配器",
"D": "加载网卡到内核中",
"answer": "D",
"solution": "",
"id": "pufa-16"
},
{
"question": "下列关于链接描述，错误的是 () 。",
"choices": [
"硬链接就是让链接文件的i 节点号指向被链接文件的i 节点",
"硬链接和符号连接都是产生一个新的i 节点",
"链接分为硬链接和符号链接",
"硬连接不能链接目录文件"
],
"answer": "B",
"solution": "",
"id": "pufa-17",
"A": "硬链接就是让链接文件的i 节点号指向被链接文件的i 节点",
"B": "硬链接和符号连接都是产生一个新的i 节点",
"C": "链接分为硬链接和符号链接",
"D": "硬连接不能链接目录文件"
},
{
"question": "在局域网络内的某台主机用ping 命令测试网络连接时发现网络内部的主机都可以连同，而不能与公网连通，问题可能是 ()。",
"choices": [
"主机IP 设置有误",
"没有设置连接局域网的网关",
"局域网的网关或主机的网关设置有误",
"局域网DNS 服务器设置有误"
],
"answer": "C",
"solution": "",
"id": "pufa-18",
"A": "主机IP 设置有误",
"B": "没有设置连接局域网的网关",
"C": "局域网的网关或主机的网关设置有误",
"D": "局域网DNS 服务器设置有误"
},
{
"question": "下列文件中，包含了主机名到IP 地址的映射关系的文件是：() 。",
"choices": [
"/etc/HOSTNAME",
"/etc/hosts",
"/etc/resolv.conf",
"/etc/networks"
],
"answer": "B",
"solution": "",
"id": "pufa-19",
"A": "/etc/HOSTNAME",
"B": "/etc/hosts",
"C": "/etc/resolv.conf",
"D": "/etc/networks"
},
{
"question": "不需要编译内核的情况是 () 。",
"choices": [
"删除系统不用的设备驱动程序时",
"升级内核时",
"添加新硬件时",
"将网卡激活"
],
"answer": "A",
"solution": "",
"id": "pufa-20",
"A": "删除系统不用的设备驱动程序时",
"B": "升级内核时",
"C": "添加新硬件时",
"D": "将网卡激活"
},
{
"question": "以下聚合函数求数据总和的是( )",
"choices": [
"MAX",
"SUM",
"COUNT",
"AVG"
],
"answer": "B",
"solution": "",
"id": "pufa-21",
"A": "MAX",
"B": "SUM",
"C": "COUNT",
"D": "AVG"
},
{
"question": "SELECT语句的完整语法较复杂,但至少包括的部分是( )",
"choices": [
"仅SELECT",
"SELECT,FROM",
"SELECT,GROUP",
"SELECT,INTO"
],
"answer": "B",
"solution": "",
"id": "pufa-22",
"A": "仅SELECT",
"B": "SELECT,FROM",
"C": "SELECT,GROUP",
"D": "SELECT,INTO"
},
{
"question": "SQL语句中的条件用以下哪一项来表达( )",
"choices": [
"THEN",
"WHILE",
"WHERE",
"IF"
],
"answer": "C",
"solution": "",
"id": "pufa-23",
"A": "THEN",
"B": "WHILE",
"C": "WHERE",
"D": "IF"
},
{
"question": "以下能够删除一列的是( )",
"choices": [
"alter table emp remove addcolumn",
"alter table emp drop column addcolumn",
"alter table emp delete column addcolumn",
"alter table emp delete addcolumn"
],
"answer": "B",
"solution": "",
"id": "pufa-24",
"A": "alter table emp remove addcolumn",
"B": "alter table emp drop column addcolumn",
"C": "alter table emp delete column addcolumn",
"D": "alter table emp delete addcolumn"
},
{
"question": "若要撤销数据库中已经存在的表S,可用()。",
"choices": [
"DELETE TABLE S",
"DELETE S",
"DROP S",
"DROP TABLE S"
],
"answer": "D",
"solution": "",
"id": "pufa-25",
"A": "DELETE TABLE S",
"B": "DELETE S",
"C": "DROP S",
"D": "DROP TABLE S"
},
{
"question": "查找表结构用以下哪一项( )",
"choices": [
"FIND",
"SELETE",
"ALTER",
"DESC"
],
"answer": "D",
"solution": "",
"id": "pufa-26",
"A": "FIND",
"B": "SELETE",
"C": "ALTER",
"D": "DESC"
},
{
"question": "要得到最后一句SELECT查询到的总行数,可以使用的函数是( )",
"choices": [
"FOUND_ROWS",
"LAST_ROWS",
"ROW_COUNT",
"LAST_INSERT_ID"
],
"answer": "A",
"solution": "",
"id": "pufa-27",
"A": "FOUND_ROWS",
"B": "LAST_ROWS",
"C": "ROW_COUNT",
"D": "LAST_INSERT_ID"
},
{
"question": "在视图上不能完成的操作是( )",
"choices": [
"查询",
"在视图上定义新的视图",
"更新视图",
"在视图上定义新的表"
],
"answer": "D",
"solution": "",
"id": "pufa-28",
"A": "查询",
"B": "在视图上定义新的视图",
"C": "更新视图",
"D": "在视图上定义新的表"
},
{
"question": "UNIQUE惟一索引的作用是( )",
"choices": [
"保证各行在该索引上的值都不得重复",
"保证各行在该索引上的值不得为NULL",
"保证参加惟一索引的各列,不得再参加其他的索引",
"保证惟一索引不能被删除"
],
"answer": "A",
"solution": "",
"id": "pufa-29",
"A": "保证各行在该索引上的值都不得重复",
"B": "保证各行在该索引上的值不得为NULL",
"C": "保证参加惟一索引的各列,不得再参加其他的索引",
"D": "保证惟一索引不能被删除"
},
{
"question": "用于将事务处理写到数据库的命令是( )",
"choices": [
"insert",
"rollback",
"commit",
"savepoint"
],
"answer": "C",
"solution": "",
"id": "pufa-30",
"A": "insert",
"B": "rollback",
"C": "commit",
"D": "savepoint"
},
{
"question": "查找条件为【】:姓名不是NULL的记录( )",
"choices": [
"WHERE NAME ! NULL",
"WHERE NAME NOT NULL",
"WHERE NAME IS NOT NULL",
"WHERE NAME!=NULL"
],
"answer": "C",
"solution": "",
"id": "pufa-31",
"A": "WHERE NAME ! NULL",
"B": "WHERE NAME NOT NULL",
"C": "WHERE NAME IS NOT NULL",
"D": "WHERE NAME!=NULL"
},
{
"question": "在视图上不能完成的操作是( )",
"choices": [
"更新视图数据",
"在视图上定义新的基本表",
"在视图上定义新的视图",
"查询"
],
"answer": "B",
"solution": "",
"id": "pufa-32",
"A": "更新视图数据",
"B": "在视图上定义新的基本表",
"C": "在视图上定义新的视图",
"D": "查询"
},
{
"question": "在SQL语言中,子查询是()。",
"choices": [
"选取单表中字段子集的查询语句",
"选取多表中字段子集的查询语句",
"返回单表中数据子集的查询语言",
"嵌入到另一个查询语句之中的查询语句"
],
"answer": "D",
"solution": "",
"id": "pufa-33",
"A": "选取单表中字段子集的查询语句",
"B": "选取多表中字段子集的查询语句",
"C": "返回单表中数据子集的查询语言",
"D": "嵌入到另一个查询语句之中的查询语句"
},
{
"question": "向数据表中插入一条记录用以下哪一项( )",
"choices": [
"CREATE",
"INSERT",
"SAVE",
"UPDATE"
],
"answer": "B",
"solution": "",
"id": "pufa-34",
"A": "CREATE",
"B": "INSERT",
"C": "SAVE",
"D": "UPDATE"
},
{
"question": "SQL语言的数据操纵语句包括SELECT、INSERT、UPDATE、DELETE等。其中最重要的,也是使用最频繁的语句是( )。",
"choices": [
"UPDATE",
"SELECT",
"DELETE",
"INSERT"
],
"answer": "B",
"solution": "",
"id": "pufa-35",
"A": "UPDATE",
"B": "SELECT",
"C": "DELETE",
"D": "INSERT"
},
{
"question": "以下哪种操作能够实现实体完整性( )",
"choices": [
"设置唯一键",
"设置外键",
"减少数据冗余",
"设置主键"
],
"answer": "B",
"solution": "",
"id": "pufa-36",
"A": "设置唯一键",
"B": "设置外键",
"C": "减少数据冗余",
"D": "设置主键"
},
{
"question": "SQL语言中,删除一个视图的命令是( )",
"choices": [
"REMOVE",
"CLEAR",
"DELETE",
"DROP"
],
"answer": "D",
"solution": "",
"id": "pufa-37",
"A": "REMOVE",
"B": "CLEAR",
"C": "DELETE",
"D": "DROP"
},
{
"question": "修改数据库表结构用以下哪一项( )",
"choices": [
"UPDATE",
"CREATE",
"UPDATED",
"ALTER"
],
"answer": "D",
"solution": "",
"id": "pufa-38",
"A": "UPDATE",
"B": "CREATE",
"C": "UPDATED",
"D": "ALTER"
},
{
"question": "以下语句错误的是( )",
"choices": [
"select sal+1 from emp;",
"select sal*10,sal*deptno from emp;",
"不能使用运算符号",
"select sal*10,deptno*10 from emp;"
],
"answer": "C",
"solution": "",
"id": "pufa-39",
"A": "select sal+1 from emp;",
"B": "select sal*10,sal*deptno from emp;",
"C": "不能使用运算符号",
"D": "select sal*10,deptno*10 from emp;"
},
{
"question": "若用如下的SQL语句创建了一个表SC:( )CREATE TABLE SC (S# CHAR(6)NOT NULL,C# CHAR(3)NOT NULL,SCORE INTEGER, NOTE CHAR(20));向SC表插入如下行时,()行可以被插入。",
"choices": [
"(NULL,’103’,80,’选修’)",
"(’200823’,’101’,NULL,NULL)",
"(’201132’,NULL,86,’’)",
"(’201009’,’111’,60,必修)"
],
"answer": "B",
"solution": "",
"id": "pufa-40",
"A": "(NULL,’103’,80,’选修’)",
"B": "(’200823’,’101’,NULL,NULL)",
"C": "(’201132’,NULL,86,’’)",
"D": "(’201009’,’111’,60,必修)"
},
{
"question": "删除用户账号命令是( )",
"choices": [
"DROP USER",
"DROP TABLE USER",
"DELETE USER",
"DELETE FROM USER"
],
"answer": "A",
"solution": "",
"id": "pufa-41",
"A": "DROP USER",
"B": "DROP TABLE USER",
"C": "DELETE USER",
"D": "DELETE FROM USER"
},
{
"question": "敏捷团队日常运作中，迭代评审会议是为了？",
"choices": [
"团队自身监视，创建下个sprint改进计划机会",
"确认系统功能与用户期望是否一致，收集用户反馈，明确后续目标",
"帮助团队自组织自改进",
"团队之间更透明，加强信任"
],
"answer": "B",
"solution": "",
"id": "pufa-42",
"A": "团队自身监视，创建下个sprint改进计划机会",
"B": "确认系统功能与用户期望是否一致，收集用户反馈，明确后续目标",
"C": "帮助团队自组织自改进",
"D": "团队之间更透明，加强信任"
},
{
"question": "6.外观设计专利是指()",
"choices": [
"对产品的整体或者局部的形状、图案或者其结合以及色彩与形状、图案的结合所作出的富有美感并适于工业应用的新设计。",
"对产品、方法或者其改进所提出的新的技术方案。",
"对产品的形状、构造或者其结合所提出的适于实用的新的技术方案，",
"科学发现"
],
"answer": "A",
"solution": "",
"id": "pufa-43",
"A": "对产品的整体或者局部的形状、图案或者其结合以及色彩与形状、图案的结合所作出的富有美感并适于工业应用的新设计。",
"B": "对产品、方法或者其改进所提出的新的技术方案。",
"C": "对产品的形状、构造或者其结合所提出的适于实用的新的技术方案，",
"D": "科学发现"
},
{
"question": "为了防范XSS攻击，需要在数据输出之前先对敏感字符进行()，能够避免跨站脚本漏洞，是防止XSS的首推之选",
"choices": [
"删除",
"替换",
"注释",
"转义"
],
"answer": "D",
"solution": "",
"id": "pufa-44",
"A": "删除",
"B": "替换",
"C": "注释",
"D": "转义"
},
{
"question": "出现业务逻辑漏洞的原因有哪些?",
"choices": [
"服务器对客户端的业务缺乏一致性验证",
"通信过程中末进行数据保护",
"很多业务作的参数是从客户端获取的",
"全部都是"
],
"answer": "D",
"solution": "",
"id": "pufa-45",
"A": "服务器对客户端的业务缺乏一致性验证",
"B": "通信过程中末进行数据保护",
"C": "很多业务作的参数是从客户端获取的",
"D": "全部都是"
},
{
"question": "DDoS攻击亦称洪水攻击，是一种网络攻击手法，其攻击方式可以具体分成两种形式( )以及资源消耗型",
"choices": [
"服务消耗型",
"延迟消耗型",
"传输消耗型",
"带宽消耗型"
],
"answer": "D",
"solution": "",
"id": "pufa-46",
"A": "服务消耗型",
"B": "延迟消耗型",
"C": "传输消耗型",
"D": "带宽消耗型"
},
{
"question": "以下关于敏捷教练(ScrumMaster)的描述，错误的是",
"choices": [
"保护团队不受外界因素的干扰",
"研发过程中，同时担任产品负责人(ProductOwner)职责",
"保证各个不同角色之间的良好协作，消除障碍",
"保证Scrum团队可以道守Scrum的价值，实践和规范"
],
"answer": "B",
"solution": "",
"id": "pufa-47",
"A": "保护团队不受外界因素的干扰",
"B": "研发过程中，同时担任产品负责人(ProductOwner)职责",
"C": "保证各个不同角色之间的良好协作，消除障碍",
"D": "保证Scrum团队可以道守Scrum的价值，实践和规范"
},
{
"question": "Devops价值不包括",
"choices": [
"可以使原本预立的开发、测试和运维等角色更好地协作",
"提供统一的运行框架和开发工具支持",
"缩短开发周期",
"提高部雷频率和发布可靠度"
],
"answer": "B",
"solution": "",
"id": "pufa-48",
"A": "可以使原本预立的开发、测试和运维等角色更好地协作",
"B": "提供统一的运行框架和开发工具支持",
"C": "缩短开发周期",
"D": "提高部雷频率和发布可靠度"
},
{
"question": "编码阶段输出不包括以下哪一项",
"choices": [
"代码评审报告",
"概要设计说明书洋细设计说明书",
"源代码",
"单元测过案例"
],
"answer": "B",
"solution": "",
"id": "pufa-49",
"A": "代码评审报告",
"B": "概要设计说明书洋细设计说明书",
"C": "源代码",
"D": "单元测过案例"
},
{
"question": "在以太网中 ARP 报文分为 ARP Request 和 ARP Response，其中 ARP Request 在网络是（ ）传送",
"choices": [
"广播",
"单播",
"组播",
"多播"
],
"answer": "A",
"solution": "",
"id": "pufa-51",
"A": "广播",
"B": "单播",
"C": "组播",
"D": "多播"
},
{
"question": "在一台 IP 地址为 192.168.0.2 的计算机上 Ping 192.168.0.1 -l 10，那么在 192.168.0.1 这台计算机上收到的 IP 报文长度是（ ）",
"choices": [
"10byte",
"38byte",
"64byte",
"56byte"
],
"answer": "B",
"solution": "",
"id": "pufa-52",
"A": "10byte",
"B": "38byte",
"C": "64byte",
"D": "56byte"
},
{
"question": "下面协议中那一个是工作在传输层并且是面向无连接的。",
"choices": [
"IP",
"ARP",
"TCP",
"UDP"
],
"answer": "D",
"solution": "",
"id": "pufa-53",
"A": "IP",
"B": "ARP",
"C": "TCP",
"D": "UDP"
},
{
"question": "下面哪个协议用于发现设备的硬件地址？",
"choices": [
"RARP",
"ARP",
"IP",
"ICMP",
"BootP"
],
"answer": "B",
"solution": "",
"id": "pufa-54",
"A": "RARP",
"B": "ARP",
"C": "IP",
"D": "ICMP",
"E": "BootP"
},
{
"question": "10.254.255.19/255.255.255.248 的广播地址是什么?",
"choices": [
"10.254.255.23",
"10.254.255.24",
"10.254.255.255",
"10.255.255.255"
],
"answer": "A",
"solution": "",
"id": "pufa-55",
"A": "10.254.255.23",
"B": "10.254.255.24",
"C": "10.254.255.255",
"D": "10.255.255.255"
},
{
"question": "下面那一个 TCP/UDP 端口范围将被客户端程序使用?",
"choices": [
"1–1023",
"1024 and above",
"1–256",
"1–65534"
],
"answer": "B",
"solution": "",
"id": "pufa-56",
"A": "1–1023",
"B": "1024 and above",
"C": "1–256",
"D": "1–65534"
},
{
"question": "哪些端口是 well-known port？",
"choices": [
"1–1023",
"1024 and above",
"1–256",
"1–65534"
],
"answer": "A",
"solution": "",
"id": "pufa-57",
"A": "1–1023",
"B": "1024 and above",
"C": "1–256",
"D": "1–65534"
},
{
"question": "地址 127.0.0.1 表示什么?",
"choices": [
"本地 broadcast",
"直接 multicast",
"本地 network",
"本地 loopback"
],
"answer": "D",
"solution": "",
"id": "pufa-58",
"A": "本地 broadcast",
"B": "直接 multicast",
"C": "本地 network",
"D": "本地 loopback"
},
{
"question": "将 172.16.100.0/24 和 172.16.106.0/24 地址聚合应该选择那种表达方式。",
"choices": [
"172.16.0.0/24",
"172.16.100.0/20",
"172.16.106.0/20",
"172.16.96.0/20"
],
"answer": "D",
"solution": "",
"id": "pufa-59",
"A": "172.16.0.0/24",
"B": "172.16.100.0/20",
"C": "172.16.106.0/20",
"D": "172.16.96.0/20"
},
{
"question": "IP 报文头中固定长度部分为多少字节？ 正确的选项是",
"choices": [
"10",
"20",
"30",
"40"
],
"answer": "B",
"solution": "",
"id": "pufa-60",
"A": "10",
"B": "20",
"C": "30",
"D": "40"
},
{
"question": "TCP/IP协议中，基于TCP协议的应用程序包括",
"choices": [
"ICMP",
"SMTP",
"RIP",
"SNMP"
],
"answer": "B",
"solution": "",
"id": "pufa-61",
"A": "ICMP",
"B": "SMTP",
"C": "RIP",
"D": "SNMP"
},
{
"question": "PING 命令使用了哪种ICMP？ 正确的选项是 。",
"choices": [
"Redirect",
"Source quench",
"Echo reply",
"Destination unreachable"
],
"answer": "C",
"solution": "",
"id": "pufa-62",
"A": "Redirect",
"B": "Source quench",
"C": "Echo reply",
"D": "Destination unreachable"
},
{
"question": "当今世界上最流行的TCP/IP协议的层次并不是按OSI参考模型来划分的，相对应于OSI 的七层网络模型，没有定义 。",
"choices": [
"物理层与链路层",
"链路层与网络层",
"网络层与传输层",
"会话层与表示层"
],
"answer": "D",
"solution": "",
"id": "pufa-63",
"A": "物理层与链路层",
"B": "链路层与网络层",
"C": "网络层与传输层",
"D": "会话层与表示层"
},
{
"question": "一个IP报文在路由器中经过一番处理之后，TTL字段值变为0，这时（ ）",
"choices": [
"路由器向IP报文的源地址发送一个ICMP错误信息，并继续转发该报文",
"路由器向IP报文的源地址发送一个ICMP错误信息，并停止转发该报文",
"路由器继续转发报文，不发送错误信息",
"路由器直接丢弃该IP报文，既不转发，也不发送错误信息",
"以上四种说法都不完全正确，要视具体情况而定"
],
"answer": "",
"solution": "",
"id": "pufa-64",
"A": "路由器向IP报文的源地址发送一个ICMP错误信息，并继续转发该报文",
"B": "路由器向IP报文的源地址发送一个ICMP错误信息，并停止转发该报文",
"C": "路由器继续转发报文，不发送错误信息",
"D": "路由器直接丢弃该IP报文，既不转发，也不发送错误信息",
"E": "以上四种说法都不完全正确，要视具体情况而定"
},
{
"question": "TCP/IP协议中，基于TCP协议的应用程序包括",
"choices": [
"ICMP",
"SMTP",
"RIP",
"SNMP"
],
"answer": "B",
"solution": "",
"id": "pufa-65",
"A": "ICMP",
"B": "SMTP",
"C": "RIP",
"D": "SNMP"
},
{
"question": "国际上负责分配IP地址的专业组织划分了几个网段作为私有网段，可以供人们在私有网络上自由分配使用，以下不属于私有地址的网段是",
"choices": [
"10.0.0.0/8",
"172.16.0.0/12",
"192.168.0.0/16",
"224.0.0.0/8"
],
"answer": "D",
"solution": "",
"id": "pufa-66",
"A": "10.0.0.0/8",
"B": "172.16.0.0/12",
"C": "192.168.0.0/16",
"D": "224.0.0.0/8"
},
{
"question": "在一个子网掩码为255.255.240.0 的网络中，（ ）不是合法的主机地址。",
"choices": [
"150.150.37.2",
"150.150.16.2",
"150.150.8.12",
"150.150.47.255"
],
"answer": "D",
"solution": "",
"id": "pufa-67",
"A": "150.150.37.2",
"B": "150.150.16.2",
"C": "150.150.8.12",
"D": "150.150.47.255"
},
{
"question": "172.16.10.32/255.255.255.224代表的是（ ）地址。",
"choices": [
"主机",
"网络",
"组播",
"广播"
],
"answer": "B",
"solution": "",
"id": "pufa-68",
"A": "主机",
"B": "网络",
"C": "组播",
"D": "广播"
},
{
"question": "IPV6地址长度为（ ）Bits。",
"choices": [
"32",
"64",
"128",
"256"
],
"answer": "C",
"solution": "",
"id": "pufa-69",
"A": "32",
"B": "64",
"C": "128",
"D": "256"
},
{
"question": "TCP协议通过（ ）来区分不同的连接。",
"choices": [
"IP地址",
"端口号",
"IP地址+端口号",
"MAC地址"
],
"answer": "C",
"solution": "",
"id": "pufa-70",
"A": "IP地址",
"B": "端口号",
"C": "IP地址+端口号",
"D": "MAC地址"
},
{
"question": "在IP协议的报文头中2字节的IP protocol type表示了IP数据报文携带的内容，代表UDP报文的数值是（ ）。",
"choices": [
"6",
"17",
"20",
"89"
],
"answer": "B",
"solution": "",
"id": "pufa-71",
"A": "6",
"B": "17",
"C": "20",
"D": "89"
},
{
"question": "在IP协议数据报文中，标志字段的最低位如果为1表示后面还有分片的数据报，该标志字段的最低位是（ ）。",
"choices": [
"CF",
"MF",
"DF",
"TTL"
],
"answer": "B",
"solution": "",
"id": "pufa-72",
"A": "CF",
"B": "MF",
"C": "DF",
"D": "TTL"
},
{
"question": "TRACERT过程中，一定不会用到的协议是（ ）。",
"choices": [
"ICMP",
"ARP",
"TCP",
"UDP"
],
"answer": "C",
"solution": "",
"id": "pufa-73",
"A": "ICMP",
"B": "ARP",
"C": "TCP",
"D": "UDP"
},
{
"question": "IP 报文中一部分字段专门用来描述报文的生命周期，即 TTL 值，它的最大值是( )。",
"choices": [
"255",
"256",
"63",
"6"
],
"answer": "A",
"solution": "",
"id": "pufa-74",
"A": "255",
"B": "256",
"C": "63",
"D": "6"
}
] |