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冰雪天气动车组接触网导线结冰受电弓取流不畅时，限速160km/h及以下
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相关试题
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CRH2A统型动车组线号８００～８９９代表AC220Ｖ系统
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CRH2A统型动车组在速度110km/h以下、操作耐雪制动开关并操作司机制动控制器手柄可以进行耐雪制动
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CRH2A统型动车组二级检修质量标准中：在绝缘测试中，主回路501C～大地间≥0.2MΩ（使用500V兆欧表）
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电动空气压缩机更换润滑油时，压缩机停止后，约30分钟以后才可打开排油口，以防止润滑油温度过高导致烫伤
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卫生间内设有紧急按钮。旅客在卫生间发生紧急情况时，按下卫生间紧急按钮，车内蜂鸣器报警且乘务员室的显示屏显示紧急报警信息，司机室内没有紧急报警信息
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为了防止前方档风玻璃产生雾气，装设了加热丝式加热器
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在受电弓没有降下或保护接地开关EGS没有闭合的情况下，高压机器箱不能打开
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行车状态下出现车门关闭故障（第2位），列车会自动施行快速制动
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在处理主变压器三次侧接地故障时，断开相应单元的辅助电源装置控制NFB（APUCN），会造成相应动力单元的空调自动减半
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动车组连接作业时间一般不超过10分钟；两列动车组摘解作业时间一般不超过16分钟
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再生电制动力的大小是随列车速度成正比的
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CRH2A统型动车组辅助空压机装置的电源为单相AC100V
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制冷剂循环系统是由压缩机、室外热交换器、干燥器、毛细管、室内热交换器、蓄能器及配管构成；内充入R22制冷剂
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牵引变压器牵引绕组设两组，原边绕组电压25kV时，牵引绕组电压为1500V
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CRH2A统型动车组车底安装的空调装置为每１节车厢２台，驾驶室设单独的空调装置
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空调换气装置正常运行时，它从室内排出多的风量补充少的新风，就可以保证车内空气压力恒定
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动车组运用所设置有外部电源，车体侧面装有连接外部电源的插座是单相AC400V、50Hz
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制动功能类别分常用、快速、紧急、辅助以及耐雪制动功能
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放置于动车组司机室内的灭火器为水性灭火器
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CRH2A统型动车组车侧显示灯亮灯、司机操纵台“关门”显示灯熄灭，如果是在出发前，则动车无法起动；如果是在运行中，则施行紧急制动
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CRH2A统型动车组4号车和6号车车顶均设受电弓、保护接地开关EGS、故障隔离开关1套，4号车和6号车的车下均设高压机器箱
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CRH2A统型动车组空调电热器，通过逆变器，使用单相400 V电源加热
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CRH2A统型动车组的空调显示设定器使用的是非稳定单相AC100V系统供电
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CRH2A统型动车组重连作业时，两动车组进入摘解线路停车，动车组均处于缓解状态
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CRH2A统型动车组在VCB合的状态下，受电弓无法降下
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CRH2A统型动车组油压减振器主要有垂向减振器、横向减振器、车间油压减振器三种类型
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CRH2A统型动车组自动广播设备在没有CF 卡的情况下启动，计算机系统只会进入普通Windows CE 的界面下
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空气制动系统中的中继阀的主要作用是放大压缩空气的流量
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动车组冬季排空流程为先进行集控或单车防冻排空再分别进行车上设备排水和车下设备排水
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CRH2A（统型）动车组达到5km/h以上时侧拉压紧装置会启动，将门和车体压紧密贴，保证气密性
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CRH2A（统型）动车组在各车厢的客室内设有紧急按钮、火灾按钮复位操作开关，按下复位开关可以复位该车厢紧急、火灾蜂鸣器
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CRH2A（统型）动车组客室照明荧光灯有三种，分别是 110W、40W、20W
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CRH2A统型型动车组扩展供电时，闭合ACK2，空调会自动减半
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CRH2A（统型）动车组由于动车组两头车采用密接车钩，其高度为1000mm
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CRH2A（统型）动车组为使MR压力保持在一定的压力范围，MR压力的范围为780—880kPa
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CRH2A（统型）动车组制动系统具备动力制动和空气制动的功能，当动力制动能力不足或丧失时，使用空气制动补充，仍须保证规定的紧急制动距离
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CRH2A（统型）动车组主牵引系统主要由受电弓、牵引变压器、牵引变流器及牵引电机组成
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CRH2A（统型）动车组线号１００～１９９的指的是AＣ１００Ｖ系统
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CRH2A动车组网络总体响应速度小于 50 ms
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CRH2A(统型)动车组影视系统素材库有 公共视频库 、公共音频库1、公共音频库2、公共音频库3
推荐试题
【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？___
【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
【单选题】
How can you protect CDP from reconnaissance attacks？___
A. Enable dynamic ARP inspection on all untrusted ports.
B. Enable dot1x on all ports that are connected to other switches.
C.
D. isable CDP on ports connected to endpoints.
【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
【单选题】
Which option is a key security compone nt of and MDM deployment ？___
A. using network-specific installer packages
B. using an application tunnel by default
C. using self-signed certificates to validate the server
D. using MS-CHAPv2 as the primary
E. AP method
【单选题】
Which Firepower Management Center feature detects and block exploits and hack attempts？___
A. Content blocker
B. file control
C. intrusion prevention
D. advanced malware protection
【单选题】
hich description of the nonsecret numbers that are used to start a Diffie- Hellman exchange is ture？___
A. They are preconfigured prime integers.
B. They are large pseudorandom numbers.
C. They are very small numbers chosen from a table of known valuses
D. They are numeric values extracted from ha shed system hostnames
【多选题】
Which two characteristics of an application layer firewall are true？___
A. provides stateful firewal functionality
B. has low processor usage
C. provides protection for multiple applications
D. provides rever se proxy services
E. is immune to URL manipulation
【多选题】
Which two devices are components of the BYOD architectural framework？___
A. Nexus 7010 switch
B. Cisco 3945 Router
C. Identify Services Engine
D. Wireless Access oints
E. Prime Infrastructure
【多选题】
Which two actions can a zone based firewall take when looking at traffic？ ___
A. forward
B. inspect
C. drop
D. broadcast
E. filter
【多选题】
n which two situations should you use in-band management？___
A. when management applications need concurrent access to the device
B. when you require administrator access from multiple locations
C. when a network device fails to forward packets
D. when you require ROMMON access
E. when the control plane fails to respond
【多选题】
What are two ways to prevent eavesdropping when you perform device management tasks？___
A. Use an SSH connection.
B. Use SNMPv3
C. Use out-of-band management
D. Use SNMP
E. Use in-band management
【多选题】
Which two features are commonly used CoPP and CPPr to protect the control plane？ ___
A. QoS
B. traffic classification
C. access lists
D. policy maps
E. class maps
F. Cisco Express Forwarding
【多选题】
Which four tunne ling prot ocols are enabled in the Dfit GrpPolicy group policy ？___
A. Clientless SSL VPN
B. SSL VPN Client
C. PPTP
D. L2TP/IPsec
E. IPsec IKEv1
F. IPsec IKEv2
