相关试题
【单选题】
子钟的地址码应可在____处进行设置更改。
A. 中心母钟
B. 二级母钟
C. 时钟网管
D. 子钟
【单选题】
宁溧线的所有子钟均为____。
A. 模拟子钟
B. 塔钟
C. 单面数显式子钟
D. 双面数显式子钟
【单选题】
时钟系统最主要的功能是为____提供标准时间。
A. 乘客
B. 车站工作人员
C. 各系统
D. 没有实际价值
【单选题】
当二级母钟发生故障时，子钟可____。
A. 不可运行
B. 可脱网独立运行
C. 可直接通过中心母钟校时运行
D. 可直接通过标准时间信号校时运行
【单选题】
3英寸数显式子钟内开关电源规格是____。
A. 2个5V/2A
B. 1个5V/2A，1个15V/2A
C. 2个15V/2A
D. 1个5V/2A，1个24V/2A
【单选题】
子钟内部出来的3芯对接线为电源线，线缆的颜色定义为____。
A. 红色为火线，蓝色为零线，黄色为地线
B. 红色为零线，蓝色为火线，黄色为地线
C. 红色为地线，蓝色为零线，黄色为火线
D. 红色为火线，蓝色为地线，黄色为零线
【单选题】
子钟内部出来的4芯对接线为信号线，线缆的颜色定义为____。
A. 红色为T+，黄色为T-，绿色为R+，蓝色为R-
B. 红色为T-，黄色为T+，绿色为R+，蓝色为R-
C. 红色为T+，黄色为T-，绿色为R-，蓝色为R+
D. 红色为T-，黄色为T+，绿色为R-，蓝色为R+
【单选题】
中心母钟通过向其他系统发送校时信号，收发状况为：____。
A. 既发送又接收
B. 既不发送又不接收
C. 只接收而不发送
D. 只发送而不接收
【单选题】
二级母钟箱的插板从左至右依次为____。
A. 电源板，信号板，信号板，通信板
B. 通信板，信号板，信号板，电源板
C. 信号板，通信板，电源板，信号板
D. 信号板，电源板，通信板，信号板
【单选题】
中心母钟的主要功能不包括____。
A. 向二级母钟提供精确的标准时间信号
B. 向全线子钟提供精确的标准时间信号
C. 向其他系统提供精确的标准时间信号
D. 向网管设备提供时间及设备状态信息
【单选题】
各车站站厅站台设置的子钟为____。
A. 3寸子钟
B. 3寸带日历子钟
C. 8寸子钟
D. 10寸子钟
【单选题】
以下子钟中，不会出现在车站的是____。
A. 3寸子钟
B. 3寸带日历子钟
C. 8寸子钟
D. 10寸子钟
【单选题】
车辆段运转室、值班员室、停车列检库、联合检修库等场所设置的子钟为____。
A. 3寸子钟
B. 3寸带日历子钟
C. 8寸子钟
D. 10寸子钟
【单选题】
二级母钟的站址号可在____上修改。
A. 时钟网管
B. 中心母钟
C. 二级母钟
D. 不可修改
【单选题】
当子钟接收不到母钟信号时，子钟____。
A. 无变化
B. 时分秒开始闪烁
C. 秒位右上角出现断开标识
D. 秒点开始闪烁
【单选题】
下方显示的子钟型号，宁溧线不存在的是____。
A. YZD314
B. YZD318
C. YZD1014
D. YZS宁溧线014
【单选题】
宁溧线与CCTV系统接口是____。
A. RS232
B. RS422
C. RS485
D. 10M/100M
【单选题】
在宁溧线，以下说法错误的是____。
A. 时钟系统与集中告警系统的接口为RS422
B. 在二级母钟与中心母钟通信正常时，手动修改二级母钟时间后，二级母钟会自动同步中心母钟时间后恢复
C. 室外子钟进行防水处理，防护等级IP≥56；室内子钟不具有防水效果
D. 一级母钟通过分配放大产生多路RS422接口信号。可以提供秒级的标准时间信号
【单选题】
宁溧线各过渡段电子围栏设备取电自____。
A. 综合监控设备房
B. 通信设备房
C. 车控室
D. 现场取电
【单选题】
宁溧线云台枪机的输入电压为____。
A. AC12V
B. DC12V
C. AC24V
D. DC24V
【单选题】
宁溧线云台枪机的默认IP为____。
A. 192.168.0.100
B. 192.168.0.1
C. 192.168.1.100
D. 192.168.1.1
【单选题】
宁溧线室内半球采用____通讯。
A. RS232
B. RS422
C. RS485
D. 10/100M
【单选题】
宁溧线安防摄像机用光端机上插入的光纤接头型号是____。
【单选题】
当电子围栏发生打火时，首先应进行的操作是____。
A. 断开电子脉冲主机的空开
B. 联系分管技术员及厂家
C. 更换该段电线
D. 试触检查漏电情况
【单选题】
宁溧线脉冲电子围栏上有____根合金线。
【单选题】
宁溧线安防系统可以做到的事情包括____。
A. 触发电子围栏后直接联动公安报警
B. 监测入侵人员并释放电流攻击
C. 对监控范围内进行录像并保存一定时间内的录像
D. 识别摄像机拍摄的人员是否为公司员工
【单选题】
以下位置中没有安防设备的是____。
A. 车辆段
B. 空港新城江宁-柘塘
C. 中山湖-幸庄
D. 卧龙湖-溧水
【单选题】
宁溧线车载PIS中，以下不属于本专业维护的是____。
A. 车载PIS服务器
B. 车载扬声器
C. 车载摄像机
D. 车载硬盘存储
【单选题】
宁溧线单节客室车厢内有____个摄像机。
【单选题】
宁溧线单个司机室内有____个摄像机。
【单选题】
MDS屏可以做到____。
A. 实时调看本列车任一个摄像机
B. 可轮询本列车全部摄像机图像
C. 可调看摄像机在TDVR存储的录像
D. 以上全部
【单选题】
NVR存储的存储时间为____左右，根据列车断电情况略有不同。
A. 30天
B. 14天
C. 90天
D. 3天
【单选题】
列车每台NVR内配置____的硬盘。
A. 1块2TB容量
B. 1块1TB容量
C. 2块2TB容量
D. 2块4TB容量
【单选题】
客室摄像机采用____。
A. 普通半球
B. 红外半球
C. 普通球机
D. 红外球机
【单选题】
司机室摄像机采用____。
A. 普通半球
B. 红外半球
C. 普通球机
D. 红外球机
【单选题】
NMS服务器安装位置在____。
A. 各司机室设备柜
B. 各A客室设备柜
C. 各B客室设备柜
D. 各客室设备柜
推荐试题
【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
【多选题】
Which two statements describe DHCP spoofing attacks？___
A. They are used to perform man-in- the-middle attacks
B. They can access most network devices
C. They can modify the flow of traffic in transit. LNGKAIG
D. They protect the identity of ti attacker by masking the DHCP address
E. They can physically modify the network gateway
【多选题】
Which two types of VLANs using PVLANs are valid？___
A. isolated
B. promiscuous
C. backup
D. secondary
E. community
【多选题】
What are two limitations of the self-zone policies on a zone-based firewall？___
A. They are unable to block Https traffic
B. They restrict SNMP traffic.
C. They are unable to support Https traffic
D. They are unable to implement application inspection
E. They are unable to perform rate limiting
【多选题】
Which two descriptions of TACACS+ are true？ ___
A. The TACACS+ header is unencrypted
B. It combines a uthentication and authorization
C. It uses TCP as its transport protocol
D. Only the password is encrypted.
E. It uses UDP as its transport protocol.
【多选题】
Which two actions does an IPS perform？ ___
A. it spans the traffic
B. it reflects the traffic back to the sender
C. it encrypts the traffic
D. it terminates the user session or connection of the attacker
E. it reconfigures a device to block the traffic
【多选题】
In which form of fraud does an attacker try to learn information such as login credenti account information by ma squerading as a reputable entity or person in email， IM or communication channels ?___
A. phishing
B. Smurfit
C. Hacking
D. Identity Spoofing
