相关试题
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放射性的来源于___和___两种。 天然的放射性,人工放射性
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放射性对人体的影响主要有___和___。 随机效应,非随机效应
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放射源Cs137的半衰期为___年,主要释放___射线。 31,r
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管道内的流体速度,一般情况下,在___处的流速最大,在___处的流速最小。 中心,管壁
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管路的防冻主要有___和___两种方法。 电伴热,蒸汽伴热
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光纤收发器的作用为___。 光电信号的互换
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和利时DCS控制系统中几种冗余措施为___、___。 I/0模块冗余,网络冗余电源冗余,主控冗余
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核辐射仪表中提到的r射线的三个特性:___、___、___。 穿透性,光电效应,散射效应
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横河电磁流量计AE14采用高低双频励磁,其中高频励磁具有___的特点,低频励磁具有___的特点。 抗流体噪声干扰,良好的零点稳定性
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计数器可分为___、___、___。 增计数器,减计数器,增减计数器
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绝对误差等于___。 测量值与真值之差
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抗干扰___常用的屏蔽材料有___、___。 铜,铁
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控制器算法中,HsCnvt.liB是___的函数库。 模拟量量程转换
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雷达分为___和___。 脉冲雷达,调频连续波雷达
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雷达天线有___、___、___三种。 杆式___,喇叭式,波导管
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雷达物位计安装方式有___、___、___三种方式。 法兰,卡环,螺纹
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膜片式压力表主要由___、___、___、___四部分组成。 测量系统,传动系统,指示系统,表壳接头
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屏蔽分为___和___两种。 磁场屏蔽,电场屏蔽
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热电偶产生热电势的条件是___、___。 两热电极材料相异,两接点温度相异
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热电阻的校验方法为:___、___。 纯度校验法,分度值校验法
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热电阻温度每升高1度,铂金属导体电阻要增加___欧。 0.38或0.385
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熔断器的作用为___,热继电器作用为___。 限流,过载保护
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三极管的三种工作状态___、___、___。 饱和,放大,截止意思相近判对
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图形组态中常见的动态特性有___、___、___、___,平移,填充,缩放,旋转,曲线,X-Y图等。 变色特性,文字特性,闪烁特性,显示隐藏特性
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为防止I/0模块插错,在端子底座上设有___。 防混销
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温度测量常用元件有:___、___、___等。 热电阻,热电隅,双金属温度计
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涡轮式流量计是一种___式流量计,涡轮流量变送器应___安装。 速度,水平
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我厂核辐射料位计由___、___、___、___组成。 放射源,探测器,SC3000微处理器,编程器
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我厂用的压力变送器多采用___线制接法。 二
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我厂用压力变送器Er07报警代表___。 输出超出上下限
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现场控制站的屏蔽地通常有___、___。 信号线屏蔽,DP通讯线屏蔽
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写出以下运算符代表的含义:GT___,LT___。 大于,小于
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新建工程时,工程名一般要求在___个字符以内。 12
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仪表按控制仪表依所用能源的不同,可以将其分为___、___、___和___等。 电动,气动,液动,混合式
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仪表测量中的五大参数是___、___、___、___、___。 温度,压力,物位,流量,在线/成分分析
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仪表的精度等级是根据引用___来划分的。 误差
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应用最广泛的工业核仪表是___、___。 料位计,密度计
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用热电偶测量温度时,其连接导线应该使用___。 补偿导线
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用于指导安装接线用的图纸是___。 安装接线图
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运算过程中对变量的访问包括___、___。 读取变量值,给变量赋值
推荐试题
【单选题】
What is an example of social engineering?___
A. gaining access to a computer by observing the user login credentials
B. gaining access to a build through an unguarded entrance
C. gaining access to a server by using a USB stick
D. gaining access to a server room by posing as local IT
【单选题】
Which type of Layer 2 attack enables the attacker to intercept traffic that is intended for one specific recipient?___
A. BPDU attack
B. DHCP starvation I LAB
C. MAC address spoofing
D. CAM table overflow
【单选题】
Which about nested policy maps in a zone-based firewall is true ?___
A. They are limited to two leve ls in a hierarchical policy
B. Parent policies are previously defined policies that are defined by using the service policy command
C. A child policy is a new policy that uses a pre-existing policy.
D. A child policy is a new that uses a pre-existing policy
【单选题】
In which configuration do you configure the ip ospf authentication key 1 command?___
A. routing process
B. interface
C. privileged
D. global
【单选题】
Which statement about command authorization and security contexts is true?___
A. If command authorization is configured, it must be enabled on all contexts.
B. The change to command invokes a new context session with the credentials of the currently
C. AAA settings are applied on a per-context basis
D. The enable. 15 user ang admins with chang to permission ha e dfferent command authorization levels pertontext
【单选题】
Which command do you enter to enable authentication for OSPF on an interface?___
A. router(config-if)#ip ospf message-digest-key 1 md5 CIS COPASS
B. router(config-if)#ip ospf authentication message-digest
C. router(config-if)#ip ospf authentication-key CISCOPASS
D. router(config-if)#area 0 authentication message-digest
【单选题】
What feature defines a campus area network?___
A. It has a single geographic location
B. It lacks external connectivity.
C. It has a limited number of segments.
D. It has limited or restricted Internet access
【单选题】
Which type of attack most commonly involves a direct attack on a network?___
A. :phishing
B. Trojan horse
C. denial of service
D. social engineering
【单选题】
What information does the key length provide in an encryption algorithm?___
A. the cipher block size
B. the hash bloc k size
C. the number of permutations
D. the packet size
【单选题】
How do you verify TaCACS+ connectivity to a device?___
A. You successfully log in to the device by using the local credentials
B. You connect via console port and receive the login prompt.
C. You connect to the device using SSH and receive the login prompt.
D. You successfully log in to the device by using ACS credentials
【单选题】
Which term best describes the concept of preventing the modification of data in transit and in storage?___
A. availability
B. confidentially
C. fidelity
D. integrity
【单选题】
Which loS command is used to define the authentication key for ntp?___
A. switch(config )#ntp authentication-key 1 mds Clcs
B. switch(config )#ntp authenticate
C. switch(config)#ntp trusted-key 1
D. switch(config)#ntp source 192.168.0.1
【单选题】
What is true about the cisco lOS Resilient Configuration feature ?___
A. The feature can be disabled through a remote session
B. There is additional space required to secure the primary cisco lOS image file.
C. The feature automatically detects image or configuration version mismatch.
D. Remote storage is used for securing files
【单选题】
When is the default deny all policy an exception in zone-based firewalls?___
A. when traffic terminates on the router via the self zone
B. when traffic traverses two interfaces in different zones
C. when traffic traverses two interfaces in the same zone
D. when traffic sources from the router via the self zone
【单选题】
.If an access port is assigned as an isolated port in a PVLAN, which network ports can it communicate with?___
A. promiscuous ports in the same PLVAN
B. isolated ports in the same PVLAN
C. all ports in the same PAVLAN at ILAR
D. all ports in the adjacent PVLAN
【单选题】
Which IPSEC mode is used to encypt traffic directly between a client and a server VPN endpoint?___
A. quick mode
B. transport mode
C. aggressive mode
D. tunnel mode
【单选题】
Which command do you enter to verify that a vpn connection is established between two endpoints and that the connection is passing traffic? ___
A. Firewall#sh crypto session
B. Firewall#debug crypto isakmp
C. Firewall#tsh crypto ipsec sa
D. Firewall#sh crypto isakmp sa
【单选题】
which type of Pvlan port allows communication from all port types?___
A. isolated
B. in -line
C. community
D. promiscuous
【单选题】
Which command do you enter to configure your firewall to conceal internal addresses?___
A. no ip directed-broadcast
B. no ip logging facility
C. no proxy-arp
D. no ip inspect audit-trial
E. no ip inspect
F. route
【单选题】
Which feature defines a campus area network? ___
A. It has a limited number of segments.
B. It has limited or restricted Internet access
C. It lacks ex1ternal connectivity.
D. It has a single geographic location
【单选题】
What technology can you use to provide data confidentiality data integrity and data origin authentication on your network?___
A. IPSec
B. Certificate Authority
C. IKE
D. Data
E. ncryption Standards
【单选题】
which standard is a hybrid protocol that uses oakley and skerne ke y exchanges is an ISAKMP framework?___
【单选题】
What is the actual los privilege level of User Exec mode?___
【单选题】
What is the effect of the asa command crypto isakmp nat-traversal?___
A. It opens port 500 only on the out side interface
B. It opens port 500 only on the inside interface
C. It opens port 4500 on all interfaces that are IPSec enabled
D. It opens port 4500 only on the out side interfac
【单选题】
Which Fire POWER preproce ssor engine is used to prevent SYN attacks?___
A. Inline normalization
B. IP Defragmentation
C. Ports can
D. etection
【单选题】
Which NAT type allows objects or groups to reference an IP address ?___
A. identity NAt
B. static NAT
C. dynamic
D. dynamic NAT
【单选题】
Which Auto NAT policies are processed first?___
A. Dynamic NAT with longest prefix
B. Dynamic NAT with shortest prefix
C. static NAT with longest prefix
D. static NAT with shortest prefix
【单选题】
Which feature allows a dynamic Pat pool to se lect the next address in the pat pool instead of the next port of an existing address?___
A. next IP
B. round robin
C. dynamic rotation
D. NAT address rotation
【单选题】
Which IPS detection method can you use to detect attacks that are based on the attackers IP address?___
A. anomally-based
B. policy-based
C. signature-based
D. reputation-based
【单选题】
Which type of encryption technology has the broadest platform support?___
A. software
B. middleware
C. file-level
D. hardware
【单选题】
Which type of address translation supports the initiation of comm unications bidirectionally ?___
A. multi-session PAT
B. dynamic NAT
C. dynamic PAT
D. static NAT
【单选题】
Which label is given to a person who uses existing computer scripts to hack into computers while lacking the expertise to write the own?___
A. script kiddy
B. white hat hacker
C. hacktivist
D. phreaker
【单选题】
What is the primary purpose of a defined rule in an IPS?___
A. to configure an event action that takes place when a signature is triggered
B. to define a set of actions that occur when a specific user logs in to the system
C. to configure an event action that is pre-defined by the system administrator
D. to detect internal attacks
【单选题】
Which option is the default valuce for the Diffie- Hell man group when configuring a site-to-site VPn on an asa device ?___
A. Group 1
B. Group 2
C. Group 5
D. Group 7
【单选题】
Which feature filters CoPP packets?___
A. access control lists
B. class maps
C. policy maps
D. route maps
【单选题】
Which command is used in global configuration mode to enable AAA?___
A. configure-model aaa
B. configure aaa-modelA
C. aaa new-model
D. aaa
E. XEC
【单选题】
Which statement about the given configuration is true?___
A. The single-connection command causes the device to establish one connection for all TACACS
B. The single-connection command causes the device to process one TacAcs request and then move to the next server
C. The timeout com mand causes the device to move to the next server after 20 seconds of TACACS inactive
【多选题】
What are two well-known security terms?___
A. phishing//网络钓鱼
B. ransomware //勒索软件
C. BPDU guard
D. LACP
E. hair-pinning
【多选题】
Which two commands must you enter to securely archive the primary bootset of a device___
A. router(config )#secure boot-config
B. router(config)#auto secure
C. router(config)#secure boot-image
D. router(config)#service passw ord-encryption
【多选题】
Which two functions can SIEM provide ?___
A. correlation between logs and events from multiple systems
B. event aggregation that allows for reduced log storage requirements
C. proactive malware analysis to block malicious traffic
D. dual-factor authentication
E. centralized firewall management