【判断题】
施工对行车有影响时，均应通过车站值班员与列车调度办理允许施工手续，按规定设好防护后，方可开工。
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相关试题
【判断题】
凡在有轨道电路区段使用的车梯必须装绝缘车轮。
【判断题】
拆除基坑防护板时，应由下而上逐层拆除。
【判断题】
装完炮眼到起爆的时间不宜大于10min。
【判断题】
编制单项工程用料计划的依据主要是施工工艺规程。
【判断题】
工具保管员负责工具保管及办理借还手续。
【判断题】
已出现故障隐患的工具，在未修复前，均可继续使用。
【判断题】
站场支柱布置，应先从一端咽喉区向另一咽喉区方向布置。
【判断题】
高路堤范围内的跨距应严格按照设计标准选用值。
【判断题】
半斜链形悬挂中，在隧道区段，承力索位于接触线的正上方，允许向曲线内侧偏差150mm。
【判断题】
工具使用必须按技术要求进行，严禁带故障使用。
【判断题】
随时计划、调配各类材料，可混用和代用。
【判断题】
巡视人员不得在道心行走，只许走枕木头。
【判断题】
施工人员不得在道心行走，只许走枕木头。
【判断题】
因地下建筑物或电力线而影响硬横跨基础施工的，可适当调整跨距，其调整原则为±2m。
【判断题】
如需向通信设备上搭挂临时通信线时，必须经本单位领导同意。
【判断题】
一切危及行车的施工作业应制定妥善的安全措施。
【判断题】
编制单项工程用料计划的依据主要是国家，行业企业有关物资计划的规定。
【判断题】
由班组保管的工具应统一存放专用库房内，并做好“四防”工作。
【判断题】
使用电振捣器捣固前，其外壳必须可靠接地。
【判断题】
光学经纬仪的度盘刻划，都是从0°~~360°逆时针方向每度注字的。
【判断题】
测定绝缘子分布电压，当4片绝缘子串中有2片无放电响声，应停止测量并及时更换。
【判断题】
在起吊腕臂时用做晃绳的白棕绳的规格是φ12mm。
【判断题】
半补偿链形悬挂中，每端固定承力索与中心锚结的钢线卡子间距为150mm。
【判断题】
新型铜合金整体吊弦的制作误差不超过±1.5mm。
【判断题】
半补偿链形悬挂中，在极限温度范围内，吊弦在顺线路方向的偏斜角不得大于25°角。
【判断题】
轨距“L”值系指钢轨轨顶下面15mm处的两轨之间的距离。
【判断题】
调整曲线拉出值时，当m实为正且m实小于m标时，应使定位处接触线位置向內轨方向移动调整。
【判断题】
当普通线岔两支接触线中有一支为非工作支时，则非支投影与钢轨交叉点处抬高不小于300mm。
【判断题】
复式交分线岔两导线交叉点垂直投影落在道岔的菱形块内，最佳位置是菱形块中心，可偏离长轴50mm、短轴50mm。
【判断题】
接触网带电部分距固定接地物的空气绝缘距离困难情况下应不小于200mm。
【判断题】
接触网无线电辐射干扰系指在正常供电情况下，接触网在一些金属件接触不良处或由于绝缘器材表面污秽等原因引起局部放电而产生的无线电辐射干扰。
【判断题】
静电危险影响计算时，对于与电气化铁道接近的地下电缆和有金属护套接地的架空电缆，将不考虑其静电感应的影响。
【判断题】
当发现人员触高压电网时，如距开关较远，可采用抛挂短路线法，迫使电源开关跳闸。抛挂地点应在伤员的远离电源侧5m以外。
【判断题】
已知接触网某定位点接触线高度为6000mm，拉出值为400mm，外轨超高为60mm，则该定位点接触线的位置是接触线的投影位置，在线路中心至外轨间，距离线路中心150mm处。
【判断题】
软横跨上用的球形和角形垫块能保证锚固拉杆有一定的水平位移。
【判断题】
当受条件限制时，绝缘滑轮用的绝缘绳的有效绝缘长度不得小于600mm。
【判断题】
软横跨所采用的结构视其所在地点的线路情况，其结构形式可用节点的组合方式来表示。
【判断题】
下部固定绳的高度以电气化股道的最高轨面连线的中心为准。
推荐试题
【单选题】
What is the highest security level that can be configured for an interface on an ASA？___
【单选题】
Which term refers to the electromagnetic interference that can radiate from network cables？___
A. Gaussian distributions
B. Doppler waves
C. emanations
D. multimode distortion
【单选题】
How does a zone pair handle traffic if the policy de fination of the zone pair is missing?___
A. It inspects all traffic.
B. It drops all traffic.
C. It permits all traffic wihtout logging
D. It permits and logs all traffic
【单选题】
default how does a zone based firewall handle traffic to add from the self zone？___
A. It permits all traffic without inspection
B. It inspects all traffic to determine how it is handled
C. It permits all traffic after inspection
D. It frops all traffic
【单选题】
Which command should beused to ena ble AAA Authentication to determine if a user can access the privilege command level？___
A. aaa authentication enable local
B. aaa authentication enable level=
C. aaa authentication enable method de fault
D. aaa authentication enable defa ult local
【单选题】
On an ASA， the policy indicates that traffic should not be translated is often referred to as which of the following？___
A. NAT zero
B. NAT forward
C. NAT nul
D. NAT allow
【单选题】
Which protocol offers data Integrity encryption， authentication， and anti-replay functions for IPSec VPN？___
A. ESP protocol
B. IKEv3 Protocol
C. AH protoco
D. IKEv1 Protocol
【单选题】
Which component offers a variety of security Solution， including firwall， IF Antivirus and antiphishing features？___
A. Cisco loS router
B. Cisco ASA 5500 Ser ies security appliance
C. Cisco ASA 5500 X series Next Gen Security appliance
D. Cisco 4200 series IPS appliance
【单选题】
Refer to the exhibit， A Network Secur ity administrator check the ASa firewall NAT policy table rith show nat command， which statement is fails？___
A. There are only reverse translation matches for the REAL SERvER object
B. First policy in the Section 1 is a dynamic nat entry defined in the object configuration
C. NAT policy in section 2 is static entry de fined in the object configuration
D. Translation in Section 3 used when a connection does not matches any entries in first two sections
【单选题】
What is true of an aSa in transparent mode ?___
A. It supports OSPF
B. It requires an IP address for each interface
C. It requires a management IP address
D. It allows the use of dynamic NaT
【单选题】
What is the effect of the ip scp server enable command？___
A. It references an access list that allows specific SCP servers
B. It allows the router to initiate requests to an SCP server
C. It allows the router to become an SCP server
D. It adds SCP to the list of allowed copy functions
【单选题】
How can you mitigate attacks in which the attacker attaches more than one vLan tag to a packet？___
A. Assign an access VLAN to every active port on the switch
B. Disable Ether Channel on the switch
C. Explicitly identity each VLAN allowed across the trunk
D.
E. nable transparent VTP on the switch
【单选题】
Which technology can you implement to centrally mitigate potential threats when users on your network download files that might be malicious？___
A. Enable file-reputation services to inspect all files that traverse the company network and block files with low reputation scores
B. Verify that the compa ny IpS blocks all known malicious website
C. Verity that antivirus software is installed and up to date for all users on your network
D. Implement URL filtering on the perimeter firewall
【单选题】
What is the most common implementation of PaT in a standard networked environment？___
A. configuring multiple external hosts to join the self zo ne and to communicate with one another
B. configuring multiple internal hosts to communicate outside of the network using the outside interface IP address
C. configuring multiple internal hosts to communicate outside of the network by using the inside interface IP address
D. configuring an any any rule to enable external hosts to communicate inside the network
【单选题】
Which component of a bYod architecture provides aAa services for endpoint access ?___
A. Integrated Services Router
B. access point
C. ASA
D. Identity Services
E. ngine
【单选题】
You are configuring a NAT rule on a Cisco ASA ,Which description of a mapped interface is true?___
A. It is mandatory for all firewall modes
B. It is optional in routed mode
C. It is optional in transparent mode
D. It is mandatory for ide ntity NAT only
【单选题】
Which description of the use of a private key is true ？___
A. The sender signs a message using the receivers private key
B. The sender signs a message using their private key
C. The sender encrypts a message using the receivers private key
D. The receiver decrypts a n15ssage using the sender's private key
【单选题】
Which mechanism does the FireAMP Connector use to avoid conflicts with other security applications such as antivirus products ?___
A. Virtualization
B. Containers
C. Sandboxing
D.
E. xclusions
【单选题】
Which network to pology de scribes multiple LANS in a gec? ___
A. SOHO
B. MAN
C. pan
D. CAN
【单选题】
Which statement represents a difference between an access list on an aSa versus an access list on a router？___
A. The asa does not support number access lists
B. The aSa does not support standard access list
C. The asa does not ever use a wildcard mask
D. The asa does not support extended access lists
【单选题】
Which command do you enter to verify the status and settings of an iKE Phase 1 tunnel？___
A. show crypto ipsec as output
B. show crypto isakmp
C. show crypto isakmp policy
D. show crypto ipsec transform
【单选题】
Which feature can help a router or switch maintain packet forwarding and protocol states despite an attack or heavy traffic load on the router or switch？___
A. service Policy
B. Control Plane Policing
C. Policy Map
D. Cisco
E. xpress
F. orwarding
【单选题】
Which STP feature can prevent an attacker from becoming the root bridge by immediately shutting down the interface when it receives a BPDU？___
A. root guard
B. Port Fast
C. BPDU guard
D. BPDU filtering
【单选题】
Which technology can best protect data at rest on a user system？___
A. full-disk encryption
B. IPsec tunnel
C. router ACL
D. network IPS
【多选题】
Which two primary security concerns can you mitigate with a BYOD solution ？___
A. schedule for patching the device
B. securing access to a trusted corporate network
C. compliance with applicable policies
D. connections to public Wi-Fi networks
E. device tagging and invento
【多选题】
choose five___
A. MD5————————inserure
B. DES————————insercure
C. SDES———————legacy
D. SHA-1———————legacy
E. HMAC-MD5—————legacy
【多选题】
Which two characteristics of symmetric encryption are true？___
A. It uses digital certificates
B. It requires more resources than asymmetric ancryption
C. It uses the same key to enctypt and decrupt traffic
D. It uses a public key and a pricate key to encrypt and decrypt traffic.
E. It is faster than asymmetric encryption
【多选题】
which two characteristics of PVLAN are true？___
A. Promiscuous porta can communicate with PVLAN ports.
B. Isolated ports cannot communicate with other ports on the same VLAN
C. Community ports have to be a part of the trunk.
D. They require VTP to be enabled in server mode
E. PVLAN ports can be configured as Ether Channel ports
【多选题】
What are two options for running Cisco SDM?___
A. Running SDM from a mobile device
B. Running SDM from within CiscoWorks
C. Running SDM from a router's flash
D. Running SDM from the Cisco web porta
E. Running SDM from a PC
【多选题】
Which two options are the primary deployment modeles for mobile device management？___
A. multisite
B. cloud-based
C. on premises
D. hybrid cloud basedo
E. single site
【多选题】
Drag the recommendation on the left to the Cryptographic algorithms on the right， Options will be used more than once.___
A. Avoid——————————————DES，MD5
B. Legacy——————————————SDES，SHA1，HMAC-MD5
【多选题】
Which two are valid types of vLans using PVLANS ?___
A. Community VLAN
B. Backup VLAN
C. Secondary VLAN
D. Isolated VLAN
E. Isolated VLAN
【多选题】
Which two commands are used to implement Resilient lOS Configuration ___
A. Secure boot-config
B. copy running-config tftp
C. copy flash:ios bin tftp
D. copy running-config startup-config
E. secure boot-image
【多选题】
Which two types of firewalls work at layer 4 and above ？___
A. Stateful inspection
B. Network Address Translation
C. Circuit-Level gateway
D. Static packet filter
E. Application Level firewall
【多选题】
Which two default settings for port security are true ？___
A. Violation is Protect
B. Violation is Restrict
C. Violation is Shutdown
D. Maximum number of MAC addresses is 2
E. Maximum number of MAC addresses is 1
【多选题】
Which two are characteristics of RADIUS？___
A. Uses UDP ports 1812 /1813
B. Uses TCP port 49
C. Uses UDP port 49
D.
E. ncrypts only the password between user and server
【多选题】
When setting up a site-to-site VPN with PSK authentication on a Cisco router， which two elements must be configured under crypto map？___
A. pfs
B. nat
C. reverse route
D. peer
E. transform-set
【多选题】
When using the Adaptive Security Device Manager（ASDM), which two options are available to add a new root certificate？___
A. Install from SFTP server
B. Usehttps
C. Install from a file
D. Use LDAP
E. Use SCEP
【多选题】
Which two SNMPv3 services support its capabilities as a secure networ k manage protocol？ ___
A. access control
B. the shared secret key
C. authentication
D. authorization
E. accounting
【多选题】
Which two statements about routed firewall mode are true ？___
A. The firewall acts as a routed hop in the network
B. This mode conceals the presence of the firewall
C. The firewall requires a unique iP address for each interface
D. This mode allows the firewall to be added to an existing networ k with minimal additional configuration By default， this mode permits most traffic to pass throug
