刷题
导入试题
【单选题】
一般来说,收集到的数据经过清洗后,还需要进行分类、排序等工作。这样做的好处主要是___。
A. :节省存储
B. :便于传输
C. :提高安全性
D. :便于查找
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答案
D
解析
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相关试题
【单选题】
在大型分布式信息系统中,为提高信息处理效率,减少网络拥堵,信息存储的原则是:数据应尽量___。
A. :集中存储在数据中心
B. :分散存储在数据产生端
C. :靠近数据使用端存储
D. :均衡地存储在各个终端
【单选题】
某社区有1 2个积极分子A~L,他们之间的联系渠道见下图。居委会至少需要通知他们之中___个人,才能通过联系渠道通知到所有积极分子。
A. : 1
B. : 2
C. : 3
D. : 4
【单选题】
___属于人工智能的应用。
A. :程序设计
B. :指纹识别
C. :社区聊天
D. :数据统计
【单选题】
),并了解他们考虑的一些问题。这些问题一般不包括___。
A. :他们对将要讨论的事项了解多少
B. :他们需要什么,又想要知道什么
C. :他们的艺术水平和欣赏能力如何
D. :他们将如何利用分析展示的信息
【单选题】
信息处理技术员资格考试的试卷包括信息处理基础知识、计算机基础知识、法律法规知识、专业英语、办公软件使用技能五个方面。某次考试后,对这五个方面分别统计了各考生的得分率以及全国的平均得分率。为了直观展现每个考生在各个方面的水平以及该考生的整体水平,并与全国平均水平进行比较,宜采用___。
A. :直方图
B. :圆饼图
C. :折线图
D. :雷达图
【单选题】
The___ is the primary device for entering information into the computer
A. :disk
B. :printer
C. :keyboard
D. :memory
【单选题】
___ system let you run more tlian one program at a time
A. : Application
B. :Software
C. : Real time
D. :Multitask
【单选题】
Small business may use___ for word processing
A. : microcomputers
B. :industrial computers
C. : mainframe computers
D. :supercomputers
【单选题】
Once you've made the Internet connection, you can send___ to any of computer user all around the w orld
A. :e-mail
B. :WWW
C. :ccc
D. :web station
【单选题】
Which statement about zone-based firewall configuration is true?___
A. You can assign an interface to more than one zone
B. Traffic is implicitly denied by de fault between interfaces in the same zone
C. The zone must be configured before it can be a ssigned
D. Traffic that is destined to or sourced from the Self zone is de nied by default
【单选题】
Refer to the exhibit line in this configuration prevents the help Desk user from modifying the interface configuration.___
A. Privilege exec level 10 interface
B. Privilege exec level 9 configure terminal
C. Privilege exec level 7 show start-up
D. Username HelpDesk privilege 6 password help
【单选题】
You have been tasked with blocking user access to websites that violate company policy, but the sites use dynamic IP addresses. What is the best practice for URl filtering to solve the problem?___
A. Enable URL filtering and use URL categorization to block the we bsites that violate company
B. Enable URL filtering and create a blacklist to block the websites that violate company policy
C. Enable URL filtering and create a whitelist to block the websites that violate company policy
D.
E. nable URL filtering and use URL categorization to allow only the websites that company policy allows users to access.
【单选题】
Within an 802. 1x-enabled network with the auth Fail feature configured, when does a switch port get placed into a restricted VLAN?___
A. When a conected client fails to authenticate after a certain number of attempts.
B. if a connected client does not support 802. 1x
C. when AAA new-model is ena bled
D. after a connected client exceeds a specified idle time
E. when 802. 1x is not globally enabled on the Cisco Catalyst switch
【单选题】
Which type of attack does a proxy firewall protect against ?___
A. cross-site scripting attack
B. worm traffic
C. port scanning
D. DDoS attacks
【单选题】
When an administrator initiates a device wipe command from the ISE, what is the immediate effect?___
A. It requests the administrator to choose between erasing all device data or only managed corporate data.
B. It requests the administrator to enter the device pin or password before proceeding with the operation
C. It notifies the device user and proceeds with the erase operation
D. It immediately erases all data on the device
【单选题】
What is a valid implicit permit rule for traffic that is traversing the ASa firewall?___
A. ARPs in both directions are permitted in transparent mode only
B. Unicast IPv4 traffic from a higher security interface to a lower security interface is permittee in routed mode only.
C. Unicast IPv6 traffic from a higher security interface to a lower security interface is permitted in transparent mode only.
D. Only BPDUs from a higher security interface to a lower secur ity interface are permitted in transparent mode.
E. Only BPDUs from a higher security interface to a lower secur ity interface are permitted in routed mode
【单选题】
A specific URL has been identified as containing malware. What action can you take to block users from accidentally visiting the URl and becoming infected with malware ?___
A. Enable URL filtering on the perimeter router and add the URls you want to block to the router's local URL list
B. Enable URL filtering on the perimeter firewall and add the URls you want to allow to the router's local URL list.
C. Enable URL filtering on the perimeter router and add the URls you want to allow to the firewall's local URL list
D. Create a blacklist that contains the URl you want to block and activate the blacklist on the perimeter rout
E. Create a whitelist that contains the URLs you want to allow and activate the whitelist on the perimeter router.
【单选题】
How does PEAP protect the EAP exchange ?___
A. It encrypts the exchange using the server certificate
B. It encrypts the exchange using the client certificate
C. It validates the server-supplied certificate,and then encrypts the exchange using the client certificate
D. It validates the client-supplied certificate,and then encrypts the excha nge using the server certificate
【单选题】
Which feature of the Cisco Email Security Appliance can mitigate the impact of snowshoe spam and sophisticated phishing attacks?___
A. contextual analysis
B. holistic understanding of threats
C. graymail management and filtering
D. signature-based IPS
【单选题】
Refer to the exhibit【nat (inside,outside)dunamic interface】 Which translation technique does this configuration result in?___
A. DynamIc PAT
B. Dynamic NAT
C. Twice NAT
D. Static NAT
【单选题】
Refer to the exhibit which are repre sents the data center?___
A. A
B. B
C. C
D. D
【单选题】
While trouble shooting site-to-site VPN, you issued the show crypto isakmp sa command. What does the given output show?___
A. IKE Phase 1 main mode was created on 10.1.1.5, but it failed to negotiate with 10.10 10.2
B. IKE Phase 1 main mode has successfully negotiated between 10.1.1.5 and 10.10..
C. IKE Phase 1 aggressive mode was created on 10.1.1.5, but it failed to negotiate with
【单选题】
Refer to the exhibit All ports on switch 1 have a primary vLan of 300 Which devices can host 1 reach?___
A. host 2
B. server
C. host 4
D. other devices within VLAN303
【单选题】
Which option is the cloud-based security service from Cisco the provides URL filtering, web browsing content security, and roaming user protection?___
A. Cloud Web service
B. Cloud Advanced Malware Protection
C. Cloud We b Security
D. Cloud Web Protection
【单选题】
How can you detect a false negative on an IPS?___
A. View the alert on the ips
B. Review the ips log
C. Review the is console
D. Use a third- party system to perform penetration testing.
E. Use a third- party to audit the next generation firewall rules
【单选题】
If a switch port goes directly into a blocked state only when a superior BPDU is received, what mechanism must be in use?___
A. STP BPDU guard
B. Loop guard
C. EtherChannel guard
D. STP Root guard
【单选题】
what improvement does EAP-FASTv2 provide over EAP-FAST? ___
A. It allows multiple credentials to be passed in a single EAP exchange.
B. It supports more secure encryption protocols
C. It allows faster authentication by using fewer packets.
D. It addresses security vulnerabilities found in the original protocol
【单选题】
When users login to the Client less Ssl Vpn using https://209.165.201.2/test ,which group policy will be applied?___
A. test
B. clientless
C. sales
D. DfitGrp Policy
E. Default RAGroup
F. Default WEB VPN
G. roup
【单选题】
Which user authentication method is used when users login to the Clientless SSLVPN portal using https://209.165.201.2/test?___
A. AAA with LOCAL database
B. AAA with RADIUS server
C. Certificate
D. :Both Certificate and aaa with LoCAL database
E. Both Certificate and AAA with RADIUS server
【单选题】
What' s the technology that you can use to prevent non malicious program to runin the computer that is disconnected from the network?___
A. Firewall
B. Sofware Antivirus
C. Network IPS
D. Host IPS
【单选题】
Which statement about the communication between interfaces on the same security level is true?___
A. Interfaces on the same security level require additional configuration to permit interinterface communication
B. Configuring interfaces on the same security level can cause asymmetric routing
C. All traffic is allowed by default between interfaces on the same security level
D. You can configure only one interface on a n individual security level
【单选题】
Which product can be used to provide application layer protection for tcp port 25 traffic?___
A. ESA
B. CWS
C. WSA
D. ASA
【单选题】
which iPS mode is less secure than other options but allows optimal network through put ?___
A. inline mode
B. inline-bypass mode
C. transparent mode
D. Promiscuous mode
【单选题】
Which feature of the Cisco Email security Appliance can mitigate the impact of snowshoe spam and sophisticated phishing attack?___
A. reputation based filtering
B. signature based IPS
C. contextual analysis
D. graymail management and filtering
【单选题】
Which type of social-engineering attack uses normal tele phone service as the attack vector?___
A. smishing
B. dialing
C. phishing
D. vishing
【单选题】
Which quantifiable item should you consider when you organization adopts new technologies?___
A. exploits
B. vulnerability
C. threat
D. Risk
【单选题】
Referencing the ClA model, in which scenario is a hash- only function most appropriate ?___
A. securing data at rest
B. securing real-time traffic
C. securing data in files
D. securing wireless transmissions
【单选题】
Which ports must be open between a aaa server and a microsoft server to permit Active Directory authentications?___
A. 445 and 389
B. 888 and 3389
C. 636 and 4445
D. 363 and 983
【单选题】
Refer to the exhibit for which reason is the tunnel unable to pass traffic___
A. the tunnel is failing to receive traffic from the remote peer
B. the local peer is unable to encrypt the traffic
C. the ip address of the remote peer is incorrect
D. UDP port 500 is blocked
【单选题】
Which type of attack can exploit design flaws in the implementation of an application without___
A. DHCP starvation attacks
B. low-rate dos attacks
C. application DDos flood attacks
D. application DDoS flood attacks
E. volume-based DDoS attacks
推荐试题
【单选题】
下列介质中,不能作为管道冲洗介质的是___。
A. 纯水
B. 蒸汽凝液
C. 工业水
D. 冷却水
【单选题】
采用氮气涨压置换,原系统中氧含量为20%(V),每次冲压至0.5MPa(表压),泄压至0.05MPa(表压),3次后,系统中的氧含量(%V)小于___视为置换合格。
A. 2%
B. 3%
C. 4%
D. 5%
【单选题】
调整裂解炉平均出口温度优先考虑的方法是___。
A. 调整烧嘴风门
B. 调整炉膛负压
C. 调整燃料气量
D. 调整进料量
【单选题】
其它工艺参数不变的条件下,裂解炉负荷增加时,急冷油循环泵出口压力应该___。
A. 上升
B. 下降
C. 不变
D. 与环境温度有关,可能上升也可能下降
【单选题】
启动离心泵时,为了使泵在最小功率下启动,避免对出口管线的冲击,需要将泵的出口阀门___。
A. 全开
B. 全关或微开
C. 半开
D. 开多大无所谓
【单选题】
急冷油循环泵在正常运行时,其轴承温度在___的区间内时轴承工作最稳定。
A. 55℃~60℃
B. 60℃~65℃
C. 65℃~70℃
D. 70℃~75℃
【单选题】
调节阀旁路的主要作用是是___。
A. 冬天防冻
B. 便于停车倒空
C. 吹扫线
D. 调节阀故障时,可用旁路调节,保证生产过程连续
【单选题】
急冷水乳化以后,汽油分馏塔塔顶温度通常会___。
A. 上升
B. 下降
C. 不变
D. 因采用的工艺不同而不同
【单选题】
皮肤被碱液灼伤后的处理方法为___。
A. 呼吸新鲜空气
B. 作人工呼吸
C. 用大量清水清洗皮肤
D. 吸氧
【单选题】
系统开车前,以下各类管道系统中需要进行冲洗操作的是___。
A. 循环急冷油管道
B. 燃料气管道
C. 裂解炉炉管
D. 蒸汽管道
【单选题】
开车期间加热急冷油时,QO粘度应控制在___*10-6m2/s以内。
A. 500
B. 800
C. 1000
D. 1200
【单选题】
裂解炉单组炉管内物流量均匀分配是靠___来完成的。
A. 文丘里管
B. 进料控制阀
C. DS控制阀
D. 锅炉给水控制阀
【单选题】
烧嘴脱火的具体表现是___。
A. 火焰呈桔红色
B. 火焰软弱无力
C. 火焰底部与烧嘴之间的距离过大
D. 火焰顶部上方可见浓烟
【单选题】
当稀释蒸汽发生系统发生严重结垢后,工艺水排污量与MS用量的的变化是___。
A. 前者减少后者增大
B. 两者都增大
C. 前者增大后者减少
D. 两者都减少
【单选题】
调节系统中调节阀气开气关的选择是为了___。
A. 保证人员和设备的安全
B. 实现闭环回路的负反馈
C. 实现闭环回路的正反馈
D. 使调节阀安全运行
【单选题】
裂解炉汽包液位控制思想是采用___控制。
A. 分程控制
B. 比值控制
C. 三冲量控制
【单选题】
在投用串级系统前,应该首先确认___。
A. 主调节器处于“MAN”状态
B. 副调节器处于“MAN”状态
C. 主副调节器的参数经过初步整定
D. 主副调节参数基本稳定,投用自动控制
【单选题】
燃料气组分变重时,裂解炉调整正确的是___。
A. 无需动作
B. 开大风机挡板
C. 关小风机挡板
D. 提高燃料气压力
【多选题】
烯烃可发生的化学反应有___。
A. 加成反应
B. 氧化反应
C. 聚合反应 .
【多选题】
列描述正确的是:___
A. 可燃液体的闪点越低,火灾危险越小。
B. 可燃物质的自燃点越高,则火灾危险性越大。
C. 可燃液体的闪点越低,火灾危险越大。
D. 可燃物质的自燃点越高,则火灾危险性越小。
【多选题】
急冷油系统的重要工艺参数包括 。___
A. 汽油分馏塔顶温度
B. 塔釜温度
C. 急冷油粘度
D. 汽油干点
E. 闪点。
【多选题】
属于工业仪表的两个基本技术指标的是___。
A. 精度级
B. 适用介质
C. 灵敏度
【多选题】
裂解炉炉膛测爆前必须确认的项目有___。
A. 风机已运行
B. 燃料气根部阀、电磁阀已经打开
C. 所有烧嘴关闭
D. 燃料气调节阀已经打开
【多选题】
急冷岗位在裂解炉提高或降负荷时,应该进行的调整有___。
A. 调整汽油分馏塔的回流量,控制好顶温
B. 调整汽油分馏塔的釜温,控制急冷油粘度
C. 调整汽油分馏塔的塔釜及侧线采出,控制塔釜液面
D. 调整急冷油循环量及中段循环量
【多选题】
进入设备内部检修作业应具备的条件包括___。
A. 有进设备作业许可证
B. 设备里有监护人
C. 有救护器具
D. 氧含量及有机物含量合格
【多选题】
下列各选项中,影响废热锅炉运行周期的因素有___。
A. 油品性质
B. 裂解深度
C. 机械损伤
D. 锅炉给水水质
【多选题】
急冷水循环泵各润滑点温度偏高,可能的原因有___。
A. 填料过紧
B. 润滑油油冷器结垢
C. 润滑油变质
D. 轴承装配不当
【多选题】
下列各项中,可能导致急冷水塔压差偏高的原因是___。
A. 裂解炉负荷高
B. 急冷水塔回流量过大
C. 急冷水塔内填料堵
D. 冷却水温度高
【多选题】
CO中毒后的救护方法包括___。
A. 将病员撤离严重污染区域
B. 必要时进行人工呼吸
C. 输氧
D. 立即请医生治疗
【多选题】
汽油分馏塔塔顶温度过高时,有效的调节措施有___。
A. 适当增加塔顶汽油回流
B. 减少侧线裂解柴油的采出量
C. 适当降低汽油分馏塔塔釜温度
D. 适当降低急冷器出口温度
【多选题】
在装置低负荷运行时,下列操作不正确的是___。
A. 如果汽油分馏塔塔釜液位较低,应该首先考虑外接调质油
B. 如果急冷油循环量较低,急冷油循环泵出口压力过高,可以考虑降低急冷油循环泵的转速
C. 如果急冷水塔塔顶温度较低,应该考虑降低急冷水循环量
D. 如果超高压蒸汽过热炉入口流量过低,应该不断熄灭烧嘴至出口温度正常
【多选题】
下列各项中,属于设备在交出检修前必须完成的有___。
A. 切断物料来源
B. 倒空物料加盲板
C. 用N2置换
D. 空气吹扫至可燃物和氧含量合格
【多选题】
导致急冷油循环泵不上量的原因有___。
A. 泵体内有气体
B. 急冷油中带水
C. 泵密封油带水
D. 急冷油粘度过高
【多选题】
装置正常运行的情况下,在对驱动急冷水循环泵的电机进行巡检时,应该关注___。
A. 电流是否稳定
B. 电机是否有杂音
C. 电流大小
D. 电机温度
【多选题】
下列哪些是裂解炉SD-1跳车的原因___
A. 烃进料压力低
B. SHP蒸汽温度过高
C. 裂解炉流出物温度高高(H-118除外)D.稀释蒸汽流量低低
【多选题】
“三不动火”是指___。
A. 没有批准的动火许可证不动火
B. 没有防火措施不动火
C. 没有监护人不动火
D. 可动可不动的坚决不动
【多选题】
下列关于H2S毒物作用性质的叙述正确的是___。
A. 刺激性
B. 血液毒性
C. 窒息性
D. 麻醉性
【多选题】
评价塔设备性能的主要指标有___。
A. 生产能力
B. 塔板效率
C. 操作弹性
D. 塔板压强降
【多选题】
裂解炉风机在运行期间应该重点检查___等参数。
A. 电机电流
B. 电机温度
C. 轴承温度
D. 振动幅度
【多选题】
塔类设备在出现淹塔时可能产生的现象是___。
A. 塔釜温度高
B. 塔釜液面高
C. 压差高
D. 晃塔
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