计算机安全知识

计算机安全知识

计算机安全 所有85道单选题

1、为了预防计算机病毒，对于外来磁盘应采取______。 A:禁止使用 B:先查毒，后使用 C:使用后，就杀毒 D:随便使用 答案:B

2、下列操作中，不能完全清除文件型计算机病毒的是______。 A:删除感染计算机病毒的文件 B:将感染计算机病毒的文件更名 C:格式化感染计算机病毒的磁盘 D:用杀毒软件进行清除 答案:B

3、在进行病毒清除时，不应当______。 A:先备份重要数据 B:先断开网络 C:及时更新杀毒软件 D:重命名染毒的文件 答案:D

4、计算机病毒是一种特殊的计算机程序段，具有的特性有_______。 A:隐蔽性、复合性、安全性 B:传染性、隐蔽性、破坏性 C:隐蔽性、破坏性、易读性 D:传染性、易读性、破坏性

答案:B

5、计算机病毒不具有______。 A:传播性 B:易读性 C:破坏性 D:寄生性 答案:B

6、下列关于防火墙的说法，不正确的是______。 A:防止外界计算机攻击侵害的技术

B:是一个或一组在两个不同安全等级的网络之间执行访问控制策略的系统 C:隔离有硬件故障的设备 D:属于计算机安全的一项技术 答案:C

7、下列不属于网络安全的技术是________。 A:防火墙

rocess. 2. land and China has a vast territory, but its arable land is limited. According to statistics, only 106.67 million hectares of cultivated land could be used (1.6 billion acres), only 867 square metres of cultivated land per capita (1.3 acres). With the growing population, modern economic development, as well as the gradual transition of urbanization in rural areas, farmland will be reduced. Development of poultry industry will occupy a certain area of land, there is a modern product with comprehensive rollup of 50,000 chickens laying hens, covers an area of 14.87 hectares (233 acres) more

(including Office of hatching, brood rearing, and laying House, eggs, feed processing workshop, Office, etc). The poultry industry should work in land conservation, not accounted for or less cultivated land, wasteland, the principle of slope land. When the chicken farm should generally not available to local arable land area to determine an appropriate level of breeding size and not, as in the past, first determine the size, then go to the expropriation. 3. energy-saving, water-saving awareness2 ... Chicken coop to keep dry, especially flat-raised floors and bedding to keep dry: shed the wet for a long time, weakened resistance in chickens, feather contamination, growth retardation, oocysts are easy to develop, as chickens live in moist environments in all the year round, the resistance will gradually reduce. appetite. production: reduction in egg. Test upon e ming, meat with Tsai chicken in relative humidity for 90% Shi, on feed into rate, and out feather, and increased heavy, are has bad effect j General chicks homes

B:加密狗 C:认证 D:防病毒 答案:B

8、为了防御网络监听，最常用的方法是______。 A:采用专人传送 B:信息加密 C:无线网 D:使用专线传输

答案:B

9、用某种方法把伪装消息还原成原有的内容的过程称为______。 A:消息 B:密文 C:解密 D:加密 答案:C

10、访问控制根据实现技术不同，可分为三种，它不包括________。 A:基于角色的访问控制 B:自由访问控制 C:自主访问控制 D:强制访问控制 答案:B

11、以下不属于网络行为规范的是________。 A:不应未经许可而使用别人的计算机资源 B:不应用计算机进行偷窃

C:不应干扰别人的计算机工作

D:可以使用或拷贝没有受权的软件 答案:D 12、网络安全的属性不包括______。 A:机密性 B:完整性 C:可用性 D:通用性 答案:D

13、消息认证的内容不包括_______。 A:证实消息发送者和接收者的真实性 B:消息内容是否曾受到偶然或有意的篡改 C:消息语义的正确性

D:消息的序号和时间 答案:C

-saving awareness2 ... Chicken coop to keep dry, especially flat-saving, water-t, as in the past, first determine the size, then go to the expropriation. 3. energynd nohe chicken farm should generally not available to local arable land area to determine an appropriate level of breeding size ashould work in land conservation, not accounted for or less cultivated land, wasteland, the principle of slope land. When t ustry(including Office of hatching, brood rearing, and laying House, eggs, feed processing workshop, Office, etc). The poultry inda modern product with comprehensive rollup of 50,000 chickens laying hens, covers an area of 14.87 hectares (233 acres) more re isrbanization in rural areas, farmland will be reduced. Development of poultry industry will occupy a certain area of land, theland per capita (1.3 acres). With the growing population, modern economic development, as well as the gradual transition of u hectares of cultivated land could be used (1.6 billion acres), only 867 square metres of cultivatedrocess. 2. land and China has a vast territory, but its arable land is limited. According to statistics, only 106.67 million chicks homes icken in relative humidity for 90% Shi, on feed into rate, and out feather, and increased heavy, are has bad effect j Generalsai chl the year round, the resistance will gradually reduce. appetite. production: reduction in egg. Test upon e ming, meat with Thickens, feather contamination, growth retardation, oocysts are easy to develop, as chickens live in moist environments in