【单选题】
What does the dh group refer to?___
A. length of key for hashing C
B. length of key for encryption
C. tunnel lifetime key
D. length of key for key exchange
E. length of key for authentication
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答案
D
解析
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相关试题
【单选题】
Which path do you follow to enable aaa through the SDM ?___
A. Configure Tasks > AAA
B. Configure > Addition Authentication > AAA
C. Configure > AAA
D. Configure > Additional Tasks > AAA
E. Configure Authentication > AAA
【单选题】
which technology cloud be used on top of an MPLS VPN to add confidentiality ?___
A. IPsec
B. 3DES
C. AES
D. SSL
【单选题】
Which term is most closely aligned with the basic purpose of a SIEM solution? ___
A. Non-Repudiation
B. Accountability
C. Causality
D. Repudiation
【单选题】
You have just deployed SNMPv3 in your environment, Your manager asks you to make sure that our SNMP agents can only talk to the SNMP Manager. What would you configure on your SNMI agents to satisfy this request?___
A. A SNMP View containing the SNMP managers
B. Routing Filter with the SNMP managers in it applied outbound
C. A standard ACL containing the SNMP managers applied to the SNMP configuration
D. A SNMP Group containing the SNMP managers
【单选题】
Which feature prevents loops by moving a nontrunking port into an errdisable state when a BPDU is received on that port?___
A. BPDU filte
B. DHCP snooping
C. BPDU guard
D. Port Fast
【单选题】
Which command enables port security to use sticky MAC addresses on a switch?___
A. switchport port-security violation restrict
B. switchport port-security mac-address sticky
C. switchport port-security violation protect
D. switchport port-security
【单选题】
When you edit an IPS subsignature, what is the effect on the parent signature and the family of subsignatures?___
A. The change applies to the parent signature and the entire family of subsignatures
B. The change applies to the parent signature and the subsignature that you edit
C. The change applies only to subsignatures that are numbered sequentially after the subsignature that you edit
D. Other signatures are unaffected, the change applies only to the subsignature that you dit
【单选题】
Which type of mechanism does Cisco FirePOWER de ploy to protect ag detected moving across other networks?___
A. antivirus scanning
B. policy-based
C. reputation-based
D. signature-based
【单选题】
What action must you take on the ise to blacklist a wired device?___
A. Locate the switch through which the device is connected and push an a cl restricting all access by the device
B. Issue a CoA request for the de vice's mac address to each access switch in the network
C. Revoke the device's certificate so it is unable to authenticate to the network
D. Add the device's MAc address to a list of black listed devices
【单选题】
Which type of firewall can perform deep packet inspection?___
A. packet-filtering firewall
B. stateless firewall
C. application firewall
D. personal firewall
【单选题】
What is the main purpose of Control Plane Policing?___
A. to prevent exhaustion of route-proce ssor resources
B. to organize the egress packet queues
C. to define traffic classes
D. to maintain the policy map
【单选题】
Which attack can be prevented by OSPF authentication?___
A. smurf attack
B. IP spoofing attack
C. denial of service attack
D. buffer overflow attack
【单选题】
What is the best definition of hairpinning?___
A. ingress traffic that traverses the outbound interface on a device
B. traffic that enters one interface on a device and that exits through another interface
C. traffic that enters and exits a device through the same interface
D. traffic that tunnels through a device interface
【单选题】
Which SNMPv3 security level provides authentication using HMAC with MD5, but does not use encryption?___
A. authPriv
B. authNo Priv
C. noAuthNoPriv
D. NoauthPriv
【单选题】
You have implemented a dynamic blacklist, using security intelligence to block illicit network activity. However, the blacklist contains several approved connections that users must access for usiness pur poses. Which action can you take to retain the blacklist while allowing users to access the approve d sites?___
A. Create a whitelist and manually add the approved addresses.
B. Disable the dynamic blacklist and deny the specif ic address on a whitelist while permitting the others
C. Edit the dynamic blacklist to remove the approved addresses
D. Disable the dynamic blacklist and create a static blacklist in its place
【单选题】
When connecting to an external resource,you must change a source IP address to use one IP address from a range of 207.165.201.1 to 207.165.1.30. Which option do you implement ?___
A. dynamic source NAT that uses an IP ad dress as a mapped source
B. static destination NAT that uses a subnet as a real de stination
C. dynamic source NAT that uses a range as a mapped source
D. static destination NAT that uses a subnet as a real source
【单选题】
Refer to the exhibit. 【nat(ins,any)dynamic interface】Which ty pe of NaT is configured on a Cisco ASA?___
A. dynamic NAT
B. source identity NAT
C. dynamic PAT
D. identity twice NAT
【单选题】
Which mitigation technology for web-based threats prevents the removal of confidential data from the network?___
A. CTA
B. DCA
C. AMP
D. DLP
【单选题】
Refer to the exhibit. What is the effect of the given configuration?___
A. It establishes the preshared key for the switch
B. It establishes the preshared key for the firewall.
C. It establishes the preshared key for the Cisco ISE appliance
D. It establishes the preshared key for the router.
【多选题】
What are two major considerations when choosing between a SPAN and a TAP when plementing IPS?___
A. the type of analysis the iS will perform
B. the amount of bandwidth available
C. whether RX and TX signals will use separate ports
D. the way in which media errors will be handled
E. the way in which dropped packets will be handled
【多选题】
What are two direct-to-tower methods for redirecting web traffic to Cisco Cloud Web Security?___
A. third-party proxies
B. Cisco Catalyst platforms
C. Cisco NAC Agent
D. hosted PAC files
E. CiSco ISE
【多选题】
Which three descriptions of RADIUS are true? ___
A. It uses TCP as its transport protocol.
B. Only the password is encrypted
C. It supports multiple transport protocols
D. It uses UDP as its transport protocol
E. It combines authentication and authorization
F. It separates authentication,authorization,and accounting
【多选题】
Which two configurations can prevent VLAN hopping attack from attackers at VLAN 10?___
A. using switchport trunk native vlan 10 command on trunk ports
B. enabling BPDU guard on all access ports
C. creating VLAN 99 and using switchport trunk native vlan 99 command on trunk ports
D. applying ACl between VLAN
E. using switchport mode access command on all host ports
F. using switchport nonegotiate command on dynamic desirable ports
【多选题】
What are two features of transparent firewall mode ___
A. It conceals the presence of the firewall from attackers
B. It allows some traffic that is blocked in routed mode
C. It enables the aSA to perform as a router.
D. It acts as a routed hop in the network.
E. It is configured by default
【多选题】
Which two models of A sa tend to be used in a data center?___
A. 5555X
B. 5585X
C. ASA service module
D. 5512X
E. 5540
F. 5520
【多选题】
Which two statements about hardware-based encrption are true?___
A. It is widely accessible
B. It is potentially easier to compromise than software-based encryption. It requires minimal configuration
C. It requires minimal configuration
D. It can be implemented without impacting performance
E. It is highly cost-effective
【多选题】
In which two modes can the Cisco We b Security appliance be de ployed?___
A. as a transparent proxy using the Secure Sockets Layer protocol
B. as a transparent proxy using the Web Cache Communication Protocol
C. explicit proxy mode
D. as a transparent proxy using the Hyper Text Transfer Protocol
E. explicit active mode
【单选题】
1.三相刀开关的图形符号与交流接触器的主触点符号是___。
A. 一样的
B. 可以互换
C. 有区别的
D. 没有区别
【单选题】
2.刀开关的文字符号是___。
A. QS
B. SQ
C. SA
D. KM
【单选题】
3.行程开关的文字符号是___。
A. QS
B. SQ
C. SA
D. KM
【单选题】
4.交流接触器的文字符号是___。
A. QS
B. SQ
C. SA
D. KM
【单选题】
5.熔断器的作用是___。
A. 短路保护
B. 过载保护
C. 失压保护
D. 零压保护
【单选题】
6.热继电器的作用是___。
A. 短路保护
B. 过载保护
C. 失压保护
D. 零压保护
【单选题】
7.交流接触器的作用是可以___接通和断开负载。
A. 频繁地
B. 偶尔
C. 手动
D. 不需
【单选题】
8.三相异步电动机的启停控制线路由电源开关、熔断器、___、热继电器、按钮等组成。
A. 时间继电器
B. 速度继电器
C. 交流接触器
D. 漏电保护器
【单选题】
9.三相异步电动机的启停控制线路中需要有___、过载保护和失压保护功能。
A. 短路保护
B. 超速保护
C. 失磁保护
D. 零速保护
【单选题】
10维修电工以___、安装接线图和平面布置图最为重要。
A. 电气原理图
B. 电气设备图
C. 电气安装图
D. 电气组装图
【单选题】
11.熔断器的额定电压应___线路的工作电压。
A. 远大于
B. 不等于
C. 小于等于
D. 大于等于
【单选题】
12.对于电阻性负载,熔断器熔体的额定电流___线路的工作电流。
A. 远大于
B. 不等于
C. 等于或略大于
D. 等于或略小于
【单选题】
13.对于电动机负载,熔断器熔体的额定电流应选电动机额定电流的___倍。
A. 1~1.5
B. 1.5-2.5
C. 2.0~3.0
D. 2.5~3.5
推荐试题
【单选题】
一旦设置在“ON”位,空调组件将如何工作:___
A. A自动且各自独立
B. B飞机离地后自动工作
C. C组件1正常工作,组件2备用
D. D发动机运转时自动工作
【单选题】
RAMAIR电门设置在“ON”位时,应急冲压空气进口门将在何时打开:___
A. A任何情况
B. B如果未选择水上迫降
C. C内外压差<1PSI且未选择水上迫降
D. D前起减震支柱压缩时
【单选题】
如果area控制器主通道故障,空调组件提供哪个温度:___
A. A组件1将驾驶舱温度控制在24℃,组件2将前后客舱温度控制在24℃
B. B组件1将温度固定在20℃,组件2将温度固定在10℃
C. C空调组件1和2将出口温度固定在15℃
D. D热空气压力调节valve完全打开
【单选题】
经调节后的空气被分配到:___
A. A驾驶舱,货舱及客舱
B. B驾驶舱,前后客舱
C. C驾驶舱,电子舱,客舱
D. D驾驶舱和轮舱
【单选题】
客舱area温度传感器是由从厨房和盥洗室风扇抽取的空气进行通风的:___
A. A正确
B. B错误
C.
D.
【单选题】
温度控制是自动的,并由下列哪一项调节:___
A. Aarea控制器
B. B空调组件1和2控制器
C. CBMC1和2
D. D以上A和B两项
【单选题】
如果空调组件控制器故障,空调组件出口温度被调节到:___
A. A0℃
B. B15℃
C. C18℃
D. D24℃
【单选题】
如果空调组件控制器故障,空调组件出口空气温度由谁控制:___
A. A空调组件旁通valve
B. B空调防冰valve
C. C空调组件流量控制valve
D. D热空气压力调节valve
【单选题】
当冲压空气按钮设置在ON位时,外流valve将:___
A. A关闭
B. B完全都打开
C. C当压差小于1PSI时部分打开
D. D当压差大于1PSI时打开
【单选题】
在下列哪种情况下空调组件流量控制valve自动关闭:___
A. A空调组件过热,发动机防火电门按出,发动机起动,水上迫降按钮按下
B. BPRV故障,空调组件出口压力增加
C. C外流valve完全关闭时
D. DAPU关车后
【单选题】
如果掺混空气系统故障,area控制器辅助通道将area温度调节到:___
A. A24℃
B. B18℃
C. C15℃
D. D10℃
【单选题】
整个area控制器故障时:___
A. A热空气压力调节valve及掺混空气valve打开,空调组件以固定温度供气,空调组件1和2都为15℃
B. B热空气压力调节valve及掺混空气valve打开,空调组件以固定温度供气,空调组件1为20℃,空调组件2为10℃
C. C组件1正常工作,组件2失效
D. D两个组件完全不能工作
【单选题】
在着陆滑跑时,空调组件冲压空气入口门在速度小于多少时打开:___
A. A150KTS(延迟30秒后)
B. B100KTS(
C. C70KTS(延迟20秒后)
D. D20KTS
【单选题】
当APU为空调组件供气时,如area温度不能被满足,空调组件将送信号给谁要求增加空气流量:___
A. A空调组件冲压空气进口门
B. BECB
C. CEIU
D. DBMC
【单选题】
在正常操作时,增压是:___
A. A全自动
B. B人工控制的
C. C必须人工选择一个系统
D. D以上A和B
【单选题】
在空中,使用CPC1时,如有故障:___
A. A必须人工进行增压控制
B. B自动转到CPC2
C. C必须人工选择CPC2
D. D必须重设着陆标高
【单选题】
外流valve的动力由谁提供:___
A. A两个马达中的一个
B. B三个马达中的一个
C. C高压空气
D. D一个液压马达
【单选题】
外流valve地面正常工作时:___
A. A完全打开
B. B完全关闭
C. C按FMGS的要求设置位置
D. D打开一半
【单选题】
如果要看外流valve的位置,需要调出ECAM的:___
A. ABLEED页面
B. BAIRCOND页面
C. CCRUISE页面
D. DPRESS页面
【单选题】
两个完全相同的,独立的,自动数字式增压控制器被用于系统控制___
A. A一个控制器主动,一个处于备份
B. B两个控制器同时控制增压
C. C1号控制器用于爬升阶段,2号控制器用于巡航及下降阶段
D. D两个控制器都由FMGS监控
【单选题】
在人工方式,哪个控制器生成过高的客舱高度和压力输出供ECAM显示:___
A. ACPC1
B. BCPC2
C. CCPC1和2
D. D既不是CPC1也不是CPC2
【单选题】
当冲压空气按钮设置在ON位时,在下列哪种压差下放气valve将部分打开___
A. A>1.5PSI
B. B<3PSI
C. C<1PSI
D. D0PSI
【单选题】
安全valve的用途是为了避免:___
A. A过高的正压差
B. B过高的负压差
C. C以上A和B
D.
【单选题】
安全valve如何驱动:___
A. A电动
B. B液压
C. C气动
D.
【单选题】
当着陆标高设在自动位时,着陆标高从何处送往控制器:___
A. A飞行管理引导系统
B. B飞行控制组件
C. C大气数据惯性基准系统
D. Darea控制器
【单选题】
当方式选择放在人工位时,外流valve是由经过控制器1或2传送的信号控制:___
A. A对
B. B错
C.
D.
【单选题】
在ECAM客舱压力页面上,外流valve指示在下列哪种情况下变成琥珀色:___
A. A在空中完全关闭
B. B在空中完全打开
C. C在地面完全打开
D. D在地面完全关闭
【单选题】
在ECAM客舱压力页面上,在下列哪种情况下,安全valve指示变成琥珀:___
A. A两个安全valve都完全打开
B. B一个安全valve打开
C. C两个安全valve都完全关闭
D. D飞机离地后
【单选题】
在ECAM客舱压力页面上,当客舱压力为多少时,客舱高度指示变成红色:___
A. A>14000英尺
B. B>11300英尺
C. C>9550英尺
D. D>8000英尺
【单选题】
客舱预增压何时开始___
A. A发动机起动时
B. B起飞功率选择时
C. C离地后
D. D人工按压电门后
【单选题】
压力安全valve在何压力下打开___
A. A8.0PSI
B. B8.6PSI
C. C9.6PSI
D. D7.6PSI
【单选题】
组件是如何进行基本的温度调节的?___
A. A它满足最低area温度的要求
B. B它调节三个area的温度
C. C它满足最高area温度的要求
D. D它满足area温度的平均需求值
【单选题】
掺混空气valve的作用是什么?___
A. A增加冷空气以优化area温度
B. B增加热空气以优化area温度
C. C调节热空气压力
D. D防止组件冷凝器结冰
【单选题】
空调防冰valve的主要作用是什么?___
A. A防止初级热交换器结冰
B. B防止主热交换器结冰
C. C防止组件冷凝器结冰
D. D增加去涡轮的空气流量
【单选题】
旁通valve的主要作用是什么?___
A. A减少去压气机的空气流量
B. B调节组件出口温度
C. C增加去涡轮的空气流量
D. D防止初级热交换器结冰
【单选题】
冲压空气进气门的作用是什么?___
A. A当双组件失效时保证客舱通气
B. B给组件压缩机提供空气
C. C调节通过热交换器的冷空气流量
D. D降低飞机速度
【单选题】
当APU供气时,把组件流量选择电门放到“LO”位,组件会产生:___
A. A高流量
B. B低流量
C. C正常流量
D. D零流量
【单选题】
当把冲压空气(RAMAIR)电门放到开位时,会出现什么情况?___
A. A空调组件的冲压空气进气门开
B. B空调组件的冲压空气排气门开
C. C应急冲压空气进气门打开
D. D外流valve完全关闭
【单选题】
着陆后,座舱增压系统是否会自动转换?___
A. A不会,必须人工选择另一系统
B. B会,接地后立即转换
C. C会,但仅在接地一段时间以后
D. D会,每次飞机通电时
【单选题】
外流valve的位置是怎样控制的?___
A. A通过三个交流马达,一次只有一个工作
B. B通过三个交流马达,一起工作
C. C通过三个直流电动马达,一次只有一个工作
D. D通过三个直流电动马达,一起工作