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1、2023年浙江软件水平考试考试模拟卷(2)本卷共分为1大题50小题,作答时间为180分钟,总分100分,60分及格。一、单项选择题(共50题,每题2分。每题的备选项中,只有一个最符合题意) 1.4B/5B编码是一种两级编码方案,首先要把数据变成(44)编码,再把 4位分为一组的代码变换成 5单位的代码。这种编码的效率是(45)44()ANRZ-IBAMICQAMDPCM2.在相隔 2000km的两地间通过电缆以 4800b/s的速率传送 3000比特长的数据包,从开始发送到接收完数据需要的时间是(50),如果用 50Kb/s的卫星信道传送,则需要的时间是(51)51()A70msB330msC
2、500msD600ms3.RIPv2对 RIPv1协议有三方面的改进。下面的选项中,RIPv2的特点不包括(52)。在 RIPv2中,可以采用水平分割法来消除路由循环,这种方法是指(53)。52()A使用组播而不是广播来传播路由更新报文B采用了触发更新机制来加速路由收敛C使用经过散列的口令来限制路由信息的传播D支持动态网络地址变换来使用私网地址4.E1载波的基本帧由 32个子信道组成,其中 30个子信道用于传递话音数据,2个子信道(42)用于传递控制信令,该基本帧的传递时间为(43)43()A100msB200μsC125μsD150μs5.下图表示了某个数据的两种编码,这两
3、种编码分别是(46),该数据是(47)46()AX为差分曼彻斯特码,Y为曼彻斯特码BX为差分曼彻斯特码,Y为双极性码CX为曼彻斯特码,Y为差分曼彻斯特码DX为曼彻斯特码,Y为不归零码6.在 Linux系统中,采用( 59)命令查看进程输出的信息,得到下图所示的结果。系统启动时最先运行的进程是(60),下列关于进程 xinetd的说法中正确的是(61)59()Aps-allBps-aefCls-aDls-la7.下图所示的调制方式是(48),若载波频率为 2400HZ,则码元速率为(49)49()A100 BaudB200 BaudC1200 BaudD2400 Baud8.某 PC不能接入 I
4、nternet,此时采用抓包工具捕获的以太网接口发出的信息如下:则该PC 的IP 地址为(56),默认网关的IP 地址为(57)。该PC 不能接入Internet 的原因可能是(58)57()A213.127.115.31B213.127.115.255C213.127.115.254D224.1.1.19.4B/5B编码是一种两级编码方案,首先要把数据变成(44)编码,再把 4位分为一组的代码变换成 5单位的代码。这种编码的效率是(45)45()A0.4B0.5C0.8D1.010.下图表示了某个数据的两种编码,这两种编码分别是(46),该数据是(47)47()A010011110B0100
5、11010C011011010D01001001011.RIPv2对 RIPv1协议有三方面的改进。下面的选项中,RIPv2的特点不包括(52)。在 RIPv2中,可以采用水平分割法来消除路由循环,这种方法是指(53)。53()A不能向自己的邻居发送路由信息B不要把一条路由信息发送给该信息的来源C路由信息只能发达给左右两边的路由器D路由信息必须用组播而不是广播方式发送12.为了限制路由信息传播的范围,OSPF协议把网络划分成 4种区域(Area),其中(54)的作用是连接各个区域的传输网络,(55)不接受本地自治系统以外的路由信息。55()A不完全存根区域B标准区域C主干区域D存根区域13.在
6、 Linux系统中,采用( 59)命令查看进程输出的信息,得到下图所示的结果。系统启动时最先运行的进程是(60),下列关于进程 xinetd的说法中正确的是(61)60()A0BnullCinitDbash14.某 PC不能接入 Internet,此时采用抓包工具捕获的以太网接口发出的信息如下:则该PC 的IP 地址为(56),默认网关的IP 地址为(57)。该PC 不能接入Internet 的原因可能是(58)58()A解析错误 DNSBTCP/IP协议安装错误C不能正常连接到网关DDHCP服务工作不正常15.某网络向 CA申请了数字证书,用户通过(64)来验证网站的真伪。在用户与网站进行安
7、全通信是,用户可通过(65)进行加密和验证,该网站通过(66)进行解密和签名。64()ACA 的签名B证书的公钥C网站的私钥D用户的公钥16.在 Windows中运行(62)命令后得到如下图所示的结果。如果要将目标地址为102.217.112.0/24 的分组经102.217.115.1 发出,需增加一条路由,正确的命令为(63)。62()Aipconfig/renewBpingCnslookupDroute print17.在 Linux系统中,采用( 59)命令查看进程输出的信息,得到下图所示的结果。系统启动时最先运行的进程是(60),下列关于进程 xinetd的说法中正确的是(61)61
8、()Axinetd是网络服务的守护进程Bxinetd是定时任务的守护进程Cxinetd进程负责配置网络接口Dxinetd进程负责启动网卡18.在 Windows中运行(62)命令后得到如下图所示的结果。如果要将目标地址为102.217.112.0/24 的分组经102.217.115.1 发出,需增加一条路由,正确的命令为(63)。63()Aroute add 102.217.112.0 mask 255.255.255.0 102.217.115.1Broute add 102.217.112.0 255.255.255.0 102.217.115.1Cadd route 102.217.1
9、12.0 255.255.255.0 102.217.115.1Dadd route 102.217.112.0 mask 255.255.255.0 102.217.115.119.某网络向 CA申请了数字证书,用户通过(64)来验证网站的真伪。在用户与网站进行安全通信是,用户可通过(65)进行加密和验证,该网站通过(66)进行解密和签名。65()ACA 的签名B证书的公钥C网站的私钥D用户的公钥20.某用户分配的网络地址为 192.24.0.0192.24.7.0,这人地址块可以用(67)表示,其中可以分配(68)个主机地址。67()A192.24.0.0/20B192.24.0.0/21
10、C192.24.0.0/16D192.24.0.0/2421.IPv6协议数据单元由一个固定头部和若干个扩展头部以及上层协议提供的负载组成,其中用于表示松散源路由功能的扩展头是(69)。如果有多个扩展头部,第一个扩展头部为(70)。69()A目标头部B路由选择头部C分段头部D安全封装负荷头部22.Routing protocols use different techniques for assigning(71)to individual networks. Further, each routing protocol forms a-metric aggregation in a diff
11、erent way. Most routing protocols can use multiple paths if the paths have an equal(72).Some routing protocols can even use multiple paths when paths have an unequal cost. In either case,load (73)can improve overall allocation of network bandwidth. When multiple paths are used, there are several way
12、s to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination lad balancing. Per-packet load balancing distributes the(74)across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets acros
13、s the possible routes based on(75).71()AcallsBmetriesClinksDdestinations23.某用户分配的网络地址为 192.24.0.0192.24.7.0,这人地址块可以用(67)表示,其中可以分配(68)个主机地址。68()A2032B2048C2000D205624.某网络向 CA申请了数字证书,用户通过(64)来验证网站的真伪。在用户与网站进行安全通信是,用户可通过(65)进行加密和验证,该网站通过(66)进行解密和签名。66()ACA 的签名B证书的公钥C网站的私钥D用户的公钥25.Routing protocols use
14、different techniques for assigning(71)to individual networks. Further, each routing protocol forms a-metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal(72).Some routing protocols can even use multiple paths when paths have an unequal cost.
15、 In either case,load (73)can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination lad balancing. Per-packet load balancing distributes the(74)a
16、cross the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on(75).72()AuserBdistanceCentityDcost26.IPv6协议数据单元由一个固定头部和若干个扩展头部以及上层协议提供的负载组成,其中用于表示松散源路由功能的扩展头是(69)。如果有多个扩展头部,第一个扩展头部为(70)。70()A逐跳头部B路由选择头部C分
17、段头部D认证头部27.Routing protocols use different techniques for assigning(71)to individual networks. Further, each routing protocol forms a-metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal(72).Some routing protocols can even use multiple paths
18、 when paths have an unequal cost. In either case,load (73)can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination lad balancing. Per-packet lo
19、ad balancing distributes the(74)across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on(75).73()AbracketingBbalancingCdownloadingDtransmitting28.Routing protocols use different techniques for ass
20、igning(71)to individual networks. Further, each routing protocol forms a-metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal(72).Some routing protocols can even use multiple paths when paths have an unequal cost. In either case,load (73)can
21、 improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination lad balancing. Per-packet load balancing distributes the(74)across the possible routes in
22、 a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on(75).74()AdestinationsBresourcesCpacketsDsources29.Routing protocols use different techniques for assigning(71)to individual networks. Further, each routing protocol for
23、ms a-metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal(72).Some routing protocols can even use multiple paths when paths have an unequal cost. In either case,load (73)can improve overall allocation of network bandwidth. When multiple path
24、s are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination lad balancing. Per-packet load balancing distributes the(74)across the possible routes in a manner proportional to the route metrics. Per-destination load ba
25、lancing distributes packets across the possible routes based on(75).75()AdestinationsBresourcesCpacketsDsources30.设机器码的长度为8,x为带符号纯小数,y为带符号纯整数,X原11111111,Y补11111111,则x的十进制真值为(),y的十进制真值为()。则x的十进制真值为()A.1/128B.–1/128C.–127/128D.127/12831.A multicast router may receive thousands of multicast
26、 () every day for different groups. If a router has no knowledge about the membership status of the () , it must broadcast all of these packets. This creates a lot of traffic and consumes (). A better solution is to keep a list of groups in the network for which there is at least one loyal member. (
27、) helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the () packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host
28、or multicast router can have membership in a group.A multicast router may receive thousands of multicast () every day for different groups.A. packetsB. errorsC. reportsD. alarms32.Excel单列表格()可以根据分隔符号分列成多列表格。如果选中某单元格并输入2000,回车后此单元格的显示内容为¥2000,那么应将此单元格的格式设置成()。Excel单列表格()可以根据分隔符号分列成多列表格。A.B.C.D.33.SNM
29、P代理使用()操作向管理端通报重要事件的发生。在下图中,()能够响应Manager2的getRequest请求。SNMP代理使用()操作向管理端通报重要事件的发生。A.GetRequestB.Get-nextRequestC.SetRequestD.Trap34.在Word编辑状态下,可以把一段字符的格式快速应用到另一段字符上,这样能够提高编排文章的效率,其方法是:单击常用工具栏上的()按钮;然后移动鼠标到待格式化的文本开始处,()。单击常用工具栏上的()按钮A.B.C.D.35.有4个网络地址:192.47.16.254、192.47.17.01、192.47.32.25和192.47.33
30、.05,如果子网掩码为255.255.240.0,则这4个地址分别属于()个子网。下面列出的地址对中,属于同一个子网的是()。则这4个地址分别属于()个子网。A.1B.2C.3D.436.某公司网络地址是206.110.64.0/18,被划分成16个子网,则每个子网的子网掩码为(),最大可容纳的主机数是()。每个子网的子网掩码为()A.255.255.255.0B.255.255.254.0C.255.255.252.0D.255.255.240.037.下图所示的微机主板的处是()插槽,处是()接口。下图所示的微机主板的处是()插槽。A.CPUB.PCIC.IDED.RAM38.双绞线电缆中
31、的4对线用不同的颜色来标识,EIA/TIA 568A规定的线序为(),而EIA/TIA T568B规定的线序为()。EIA/TIA 568A规定的线序为()A.橙白;橙;绿白;蓝;蓝白;绿;褐白;褐B.蓝白;蓝;绿白;绿;橙白;橙;褐白;褐C.绿白;绿;橙白;蓝;蓝白;橙;褐白;褐D.绿白;绿;橙白;橙;蓝白;蓝;褐白;褐39.设机器码的长度为8,x为带符号纯小数,y为带符号纯整数,X原11111111,Y补11111111,则x的十进制真值为(),y的十进制真值为()。y的十进制真值为()A.–1B.127C.–127D.140.A multicast router
32、may receive thousands of multicast () every day for different groups. If a router has no knowledge about the membership status of the () , it must broadcast all of these packets. This creates a lot of traffic and consumes (). A better solution is to keep a list of groups in the network for which the
33、re is at least one loyal member. () helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the () packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupi
34、ds are mutually exclusive. A host or multicast router can have membership in a group.If a router has no knowledge about the membership status of the (), it must broadcast all of these packets.A. routersB. networkC. packetsD. hosts41.Excel单列表格()可以根据分隔符号分列成多列表格。如果选中某单元格并输入2000,回车后此单元格的显示内容为¥2000,那么应将此
35、单元格的格式设置成()。如果选中某单元格并输入2000,回车后此单元格的显示内容为¥2000,那么应将此单元格的格式设置成()。A数值B人民币C货币D科学记数42.有4个网络地址:192.47.16.254、192.47.17.01、192.47.32.25和192.47.33.05,如果子网掩码为255.255.240.0,则这4个地址分别属于()个子网。下面列出的地址对中,属于同一个子网的是()。下面列出的地址对中,属于同一个子网的是()A.192.47.16.254和192.47.32.25B.192.47.16.254和192.47.17.01C.192.47.17.01和192.47
36、.33.05D.192.47.17.01和192.47.32.2543.A multicast router may receive thousands of multicast () every day for different groups. If a router has no knowledge about the membership status of the () , it must broadcast all of these packets. This creates a lot of traffic and consumes (). A better solution i
37、s to keep a list of groups in the network for which there is at least one loyal member. () helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the () packets destined for that group. This means that if there are three multicas
38、t routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.This creates a lot of traffic and consumes ().A. capabilityB. powerC. bandwidthD. address44.双绞线电缆中的4对线用不同的颜色来标识,EIA/TIA 568A规定的线序为(),而EIA/TIA T568B规定的线序为()。而EIA
39、/TIA T568B规定的线序为()A.橙白;橙;绿白;蓝;蓝白;绿;褐白;褐B.蓝白;蓝;绿白;绿;橙白;橙;褐白;褐C.绿白;绿;橙白;蓝;蓝白;橙;褐白;褐D.绿白;绿;橙白;橙;蓝白;蓝;褐白;褐45.下图所示的微机主板的处是()插槽,处是()接口。下图所示的微机主板处是()接口。A.COMB.RJ-45C.USBD.PS/246.SNMP代理使用()操作向管理端通报重要事件的发生。在下图中,()能够响应Manager2的getRequest请求。在下图中,()能够响应Manager2的getRequest请求。A.Agent1B.Agent2C.Agent3D.Agent447.在W
40、ord编辑状态下,可以把一段字符的格式快速应用到另一段字符上,这样能够提高编排文章的效率,其方法是:单击常用工具栏上的()按钮;然后移动鼠标到待格式化的文本开始处,()。然后移动鼠标到待格式化的文本开始处,()。A.按键的同时单击鼠标左键即可B.按键的同时单击鼠标右键即可C.按住鼠标左键拖动鼠标,到达待格式化的文本末尾时松开鼠标键D.按住鼠标右键拖动鼠标,到达待格式化的文本末尾时松开鼠标键48.某公司网络地址是206.110.64.0/18,被划分成16个子网,则每个子网的子网掩码为(),最大可容纳的主机数是()。最大可容纳的主机数是()A.254B.512C.1022D.102449.A m
41、ulticast router may receive thousands of multicast () every day for different groups. If a router has no knowledge about the membership status of the () , it must broadcast all of these packets. This creates a lot of traffic and consumes (). A better solution is to keep a list of groups in the netwo
42、rk for which there is at least one loyal member. () helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the () packets destined for that group. This means that if there are three multicast routers connected to a network, their
43、 lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.() helps the multicast router create and update this list.A. ICMPB. IGMPC. OSPFD. RIP50.A multicast router may receive thousands of multicast () every day for different groups. If a router has no kno
44、wledge about the membership status of the () , it must broadcast all of these packets. This creates a lot of traffic and consumes (). A better solution is to keep a list of groups in the network for which there is at least one loyal member. () helps the multicast router create and update this list.
45、For each group, there is one router that has the duty of distributing the () packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.For each group, there is one router that has the duty of distributing the () packets destined for that group.A. anycastB. multicastC. unicastD. broadcast