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【单选题】
下列不属于局域网设备的是_______。[232000000]___
A. 网络交换机
B. 集线器
C. 令牌环网卡
D. Modem
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D
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相关试题
【单选题】
调制解调器的作用是_______。[232000000]___
A. 为了上网与接电话两不误
B. 将模拟信号转换成计算机的数字信号,以便接收
C. 半计算机的数字信号转换成模拟信号,以便发送
D. 将计算机数字信号与模拟信号互相转换,以便传输
【单选题】
下列有关互联设备的叙述中,_______说法是错误的。[232000000]___
A. 集线器是一种网络互联设备
B. 路由器是网络层的互联设备
C. 网桥是数据链路层的互联设备
D. 网关是需要对网络各层协议进行转换的互联设备
【单选题】
下列不属于防火墙技术的是_______。[232000000]___
A. 数据包过滤
B. 应用级网关
C. 代理服务器
D. IPSec技术
【单选题】
ISP是指_______。[232000000]___
A. Internet服务提供商
B. 传输协议
C. Internet
D. 一种域名
【单选题】
下列对子网系统的防火墙的描述错误的是_______。[232000000]___
A. 控制对系统的访问
B. 集中的安全管理
C. 增强系统的保密性
D. 防止内部和外部的威胁
【单选题】
数据双向传输不能同时进行的通信模式叫_______。[232000000]___
A. 全双工
B. 单向通信
C. 半双工
D. 混合通信
【单选题】
下列网络类型属于局域网的是_______。[212000000]___
A. 以太网
B. X.25
C. Internet
D. ISDN
【单选题】
TCP/IP参考模型中的TCP协议对应着OSI参考模型的_______。[222000000]___
A. 物理层
B. 数据链路层
C. 传输层
D. 网络层
【单选题】
局域网的网络硬件主要包括网络服务器、工作站、_______、通信介质。[222000000]___
A. 计算机
B. 网卡
C. 网络拓朴结构
D. 网络协议
【单选题】
下列传输介质中传输带宽最大的是_______。[222000000]___
A. 双绞线
B. 基带同轴电缆
C. 光纤
D. 宽带同轴电缆
【单选题】
在网络互联设备中,_______主要用于将局域网与广域网互联。[222000000]___
A. 路由器
B. 网关
C. 网桥
D. 中继器
【单选题】
Internet中采用的数据交换技术是_______。[222000000]___
A. 电路交换
B. 报文交换
C. 分组交换
D. 信元交换
【单选题】
两个以上的(不包括两个)同类型网络互连时,则选用_______进行网络互联。[232000000]___
A. 中继器
B. 网桥
C. 路由器
D. 集线器
【单选题】
对局域网来说,网络控制的核心是_______。[222000000]___
A. 工作站
B. 网卡
C. 网络服务器
D. 网络互连设备
【单选题】
在电源变压器二次电压相同的情况下,桥式整流电路输出电压是半波整流电路输出电压的_______。[312010201]___
A. 2倍
B. 3倍
C. 4倍
D. 5倍
【单选题】
半导体是_______介于导体和绝缘体之间的物质。[332010102]___
A. 密度
B. 比重
C. 导热能力
D. 导电能力
【单选题】
晶体三极管按构造分有_______两种类型。[322010102]___
A. PPN和NPN
B. PPN和PNN
C. PNP和NPN
D. PNP和PNN
【单选题】
一个10kΩ、0.5W的电阻,使用时允许通过的最大电流是_______。[223000000]___
A. 0.05mA
B. 0.707mA
C. 2.23mA
D. 7.07mA
【单选题】
电容器C1(100V20μF)、C2(100V30μF)和C3(100V40μF)串联接到直流150V的电压上,则_______两端承受的电压较少。[223000000]___
A. C1
B. C2
C. C3
D. C1和C3
【单选题】
电池A电动势为2V,内阻为1Ω,电池B电动势为2.5V,内阻为2.5Ω,先后用A、B作电源向同一电阻供电,电流相等,这个电阻阻值R=_______。[223000000]___
A. 0.5Ω
B. 1.25Ω
C. 2.5Ω
D. 5Ω
【单选题】
直流反馈是指反馈到输入电路的是输出电路中_______的直流电流或直流电压。[323010102]___
A. 基极
B. 发射极
C. 集电极
D. 旁路电容
【单选题】
稳压二极管与一般二极管不同,它的反向击穿是_______。[323010102]___
A. 不可逆的
B. 可逆的
C. 毁坏的
D. 不可发生的
【单选题】
稳压二极管工作于_______状态时,在电路中能起稳压作用。[323010102]___
A. 饱和
B. 截止
C. 正向导通
D. 反向击穿
【判断题】
在以并置或差置调车信号按钮作列车进路变通按钮时,按压一个按钮,另一个按钮继电器应被带动吸起
A. 对
B. 错
【判断题】
KJ的作用是记录进路的始端和防止信号自动关闭
A. 对
B. 错
【判断题】
经过方向继电器前接点送的电源叫方向电源
A. 对
B. 错
【判断题】
色灯进站信号机红灯灭灯后仍可以开放允许信号
A. 对
B. 错
【判断题】
安全型继电器都是直流继电器
A. 对
B. 错
【判断题】
6502电气集中室内控制台盘面,在进路未锁闭时,股道有车,亮两节红光带;股道空闲,不亮光带
A. 对
B. 错
【判断题】
安全线和避难线上,可以停留机车车辆
A. 对
B. 错
【判断题】
XJ的作用是记录进路的始端和防止信号自动关闭
A. 对
B. 错
【判断题】
遮断信号机和复示信号机平时都不点灯
A. 对
B. 错
【判断题】
熔断器的容量在无具体规定的情况下其容量应为最大负荷电流的1倍
A. 对
B. 错
【判断题】
使用中的有极继电器,线圈4接电源的正极,线圈1接电源的负极
A. 对
B. 错
【判断题】
通过交流继电器线圈中的电流主要由电阻来决定
A. 对
B. 错
【判断题】
车站信号平面图是编制联锁表的依据
A. 对
B. 错
【判断题】
在组合侧面的电源配线中,只有KZ、KF电源采用了双环
A. 对
B. 错
【判断题】
CTC系统实现各种功能时,应保证车站、区间信号设备既有联锁关系的完整性
A. 对
B. 错
【判断题】
在道岔表示电路发生故障时,可采取引导进路锁闭方式引导接车
A. 对
B. 错
【判断题】
在选排长调车进路时,因中间信号点的AJ不吸起,所以中间信号点的按钮表示灯不亮
A. 对
B. 错
推荐试题
【多选题】
Which two SMTP Notification Event Details are specific to alarms triggered by events? (Choose two.)___
A. User Name
B. Summary
C. Old Status
D. Target
【多选题】
Which two High Availability ___ Cluster admission control policies can help avoid resource fragmentation? (Choose two.)(AC)
A. Define failover capacity by static number of hosts
B. Define failover capacity by reserving a percentage of the cluster resources
C. Use dedicated failover hosts
D. Use Virtual Machine Monitoring
【多选题】
An attempt to enable vSphere Fault Tolerance for a powered-on virtual machine fails. Which two scenarios would result in this failure? (Choose two.)___
A. The virtual machine has three vCPUs configured.
B. The host on which the virtual machine is running has insufficient memory resources.
C. The virtual machine has insufficient resources to accommodate full reservation plus the overhead memory.
D. VMware High Availability is enabled on the cluster of which this host is a member.
【多选题】
A vApp template recently added to a Content Library is not displayed. Which two actions could correct this problem? (Choose two.)___
A. Manually synchronize the library
B. Select the Download all library content immediately option
C. Select the Sync subscribed library option
D. Manually download the vApp template
【多选题】
What are three valid disk configurations for the vSphere Data Protection 6.x Appliance? (Choose three.)___
A. 500GB
B. 1TB
C. 1.5TB
D. 2TB
E. 4TB
【多选题】
Which three connection types are available when configuring a vSwitch in the vSphere Web Client? (Choose three.)___
A. VMkernel Network Adapter
B. Physical Network Adapter
C. Virtual Machine Port Group for a Standard Switch
D. vMotion Network Adapter
E. vSAN Network Adapter
【多选题】
Which three features can be enabled for a new host cluster? (Choose three.)___
A. Storage Distributed Resource Scheduling
B. High Availability
C. Fault Tolerance
D. Distributed Resource Scheduling
E. Virtual SAN
【多选题】
An administrator receives a report that no real time statistics are available for a virtual machine in the vCenter Server inventory. Which two statements indicate likely causes of the problem? (Choose two.)___
A. The virtual machine is powered off.
B. The host containing the virtual machine is disconnected from vCenter Server.
C. There is insufficient real time data to display the information.
D. The vCenter Server service is not running.
【多选题】
Your manager has given you a bash script that retrieves data for ESXi 6.x host configurations. This data needs to be collected right after the installation of a host and must be run directly on the host. Which two actions can be used to run this script on an ESXi host? (Choose two.)___
A. Connect to the host with Ruby vSphere Console and run the script from there.
B. Enable SSH access from the Direct Console User Interface.
C. Enable the ESXi Shell from the
D. irect Console User Interface.
【多选题】
Which two are true about the Risk badge in vRealize Operations? (Choose two.)___
A. The Risk badge indicates potential future problems that may degrade the performance of the system.
B. Risks may require attention in the near future.
C. The Risk badge indicates problems that are degrading performance of the system.
D. Risks require attention now to correct system performance problems.
【多选题】
vSphere Update Manager allows which two virtual machine attributes to be upgraded? (Choose two.)___
A. Virtual machine firewall policies for NSX.
B. Software Packages in the virtual machine.
C. Virtual machine Hardware Version.
D. VMware Tools Upgrade.
【多选题】
What are two benefits of using NFS 4.1 with vSphere 6.x as compared to NFS 3? (Choose two.)___
A. NFS 4.1 supports Kerberos Authentication
B. NFS 4.1 supports multipathing
C. NFS 4.1 supports IPv6
D. NFS 4.1 supports hardware acceleration
【多选题】
Which three statements are true regarding Fault Tolerance? (Choose three.)___
A. Applications need to be continuously available to users.
B. Applications without native clustering capabilities can be protected.
C. Custom clustering solutions are complicated to configure and maintain.
D. Applications that have 16 vCPUs are supported.
E. Prevents application crashes by analyzing the workload and correcting problems.
【多选题】
Which two statements are true regarding VMware vSphere Flash Read Cache (vFRC)? (Choose two.)___
A. Cache fills and cache evictions happen in the granularity of a cache block size.
B. vFRC caches data from both read and write I/Os, but write I/Os are always serviced by the underlying storage.
C. vFRC caches data from both read and write I/Os, but write I/Os are always serviced by the underlying cache data.
D. Cache fills and cache evictions happen in the granularity of the disk block size.
【多选题】
What are two possible causes of Storage Distributed Resource Scheduler (SDRS) being disabled on one or more virtual machine disks in a datastore cluster? (Choose two.)___
A. The virtual machine has vSphere Fault Tolerance disabled.
B. The virtual machine is a template.
C. The virtual machine swap file is on a shared datastore.
D. The disk is a CD-ROM/ISO file.
【多选题】
An administrator attempts to install vCenter Single Sign-On Server. The installer returns an error message indicating that the installation failed. Prior to the installation, all setup prerequisites were met. The administrator has generated a vCenter Server Single Sign-On support bundle. Which two files should the administrator analyze to determine the cause of the failure? (Choose two.)___
A. Server\utils\logs\imsTrace.log
B. Server\utils\logs\install.txt
C. %TEMP%\utils\logs\vminst.log
D. %TEMP%\vminst.log
【多选题】
An administrator is unable to remove an ESXi 6.x host from a vSphere Distributed Switch. What are two likely reasons for this issue? (Choose two.)___
A. Vmkernel interfaces on the switch are still in use.
B. VM Network port group adapters are connected to different switch.
C. Physical NICs are migrated to different switch.
D. VM Network adapters are connected to this switch.
【多选题】
Which two Identity Sources are available to add for vCenter Single Sign-On authentication? (Choose two.)___
A. LocalOS
B. OpenLDAP
C. NIS as an LDAP Server
D. VCMSDS
【多选题】
What are three goals of resource management within a cluster? (Choose three.)___
A. To prevent virtual machines from monopolizing resources and to guarantee predictable service rates.
B. To exploit undercommitted resources and overcommit with graceful degradation.
C. To provide solutions to potential problems that you might encounter when using vCenter Server.
D. To control the relative importance of virtual machines and provide flexible dynamic partitioning.
E. To provide additional network administration capabilities.
【多选题】
Which three actions can be taken as a result of executing the vSphere Update Manager 6.x scan and remediation wizards? (Choose three.)___
A. Install and upgrade software in virtual machines.
B. Upgrade the firmware on ESXi host devices.
C. Upgrade and Patch ESXi hosts.
D. Install and update third-party software on hosts.
E. Upgrade virtual machine hardware.
【多选题】
Which two statements are true about deploying and using vSphere Replication? (Choose two.)___
A. ESXi hosts managed by a single vCenter Server instance require a connection between the two vSphere Replication appliances.
B. Sites managed by different vCenter Server instances require a connection between the two vSphere Replication appliances.
C. Sites managed by different vCenter Server instances require the use of Site Recovery Manager and a connection between the two vSphere Replication appliances.
D. ESXi hosts managed by a single vCenter Server instance require a single vSphere Replication appliance.
【多选题】
An administrator is attempting to power on a virtual machine, but the task is hanging at 95%. What three scenarios best explain why this problem is happening? (Choose three.)___
A. A virtual machine question is currently being posed to the administrator.
B. Another task for the virtual machine or other component is already in progress.
C. The VMware High Availability cluster has insufficient resources to guarantee failover.
D. The host has lost access to the storage device containing the virtual machine files.
E. The host is under resource contention and unable to power on the virtual machine.
【多选题】
Which three features are not supported when using Fault Tolerance in vSphere 6.x? (Choose three.)___
A. Virtual Volumes (VVOLS)
B. Storage vMotion
C. Virtual Machine Component Protection
D. vMotion
E. vSphere Distributed Switches
【多选题】
Which two storage controller configurations can be used with Virtual SAN? (Choose two.)___
A. SAS controllers in Passthrough mode
B. SAS controllers in RAID0 mode
C. SAS controllers in RAID1 mode
D. SAS controllers in RAID10 mode
【多选题】
Which three are requirements when using vMotion to move a virtual machine across vCenter Server systems? (Choose three.)___
A. Both vCenter Servers must be using Enhanced Linked Mode.
B. Both vCenter Servers must be in the same Single Sign-On Domain.
C. Time must be synchronized.
D. Duplicate VM MAC addresses must be configured.
E. Both vCenter Servers must have High Availability enabled on source and destination clusters.
【多选题】
Which two components can be used when configuring Enhanced Linked Mode? (Choose two.)___
A. vCenter Server Appliance
B. vRealize Operations Manager
C. vSphere Management Appliance
D. vCenter Server for Windows
【多选题】
An organization has a number of virtual machines that would benefit from Fault Tolerance. These include: <A single vCPU Apache Server> < A dual vCPU vCenter Server> < A quad vCPU SQL Server> <An eight vCPU Hadoop Server>. Which two virtual machines can be configured to use VMware Fault Tolerance? (Choose two.)___
A. Apache Server
B. vCenter Server
C. SQL Server
D. Hadoop Server
【多选题】
Which two badges are major badges in vRealize Operations? (Choose two.)___
A. Risk
B. Efficency
C. Workload
D. Faults
【多选题】
An administrator is deploying multiple Windows 2003 Virtual Machines from the same template. What two steps should be taken to avoid network conflicts? (Choose two.)___
A. Customize the guest operating system.
B. Install VMware Tools into the new virtual machines.
C. Copy the Microsoft Sysprep tools onto the vCenter Server system.
D. Ensure the e1000 vmnic is selected for each new virtual machine.
【多选题】
Which three conditions would prevent Storage I/O Control from being enabled on a group of datastores? (Choose three.)___
A. The datastores planned for the solution are used by different vSphere clusters.
B. A datastore planned for the solution is configured as a Raw Device Mapping file.
C. A datastore planned for the solution has three extents.
D. A datastore planned for the solution is configured as NFS.
E. The organization has an Enterprise license.
【多选题】
Which two actions are prerequisites to adding ESXi 6.x hosts to a vSphere Distributed Switch? (Choose two.)___
A. Verify that there is at least one Distributed Port Group on the Distributed Switch.
B. Verify that the Distributed Port Group have active uplinks configured in its teaming and failover policy.
C. Verify that the
D. istributed Switch has been configured with a Network Profile.
【多选题】
An organization has configured Distributed Power Management (DPM) on a vSphere 6 cluster. The organization wants to be alerted when an ESXi host has been powered down by DPM. Which two options represent the type and name of the alarm that would accomplish this? (Choose two.)___
A. DrsEnteringStandbyModeEvent
B. DrsEnteredStandbyModeEvent
C. Event-based
D. Condition-based
【多选题】
Which two allow for the disabling of Network Rollback operations? (Choose two.)___
A. Modifying the vpxd advanded configuration options and adding the config.vpxd.network.rollback key
B. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\vpxd.cfg file and adjusting the<rollback> xml tag
C. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\vpxd.cfg file and adjusting the <networkrollback> xml tag
D. Modifying the C:\ProgramData\VMware\CIS\cfg\vmware-vpx\firstboot\vpxd-service- spec.prop file and adjusting the <rollback> xml tag
【多选题】
An administrator is tasked with performing a vMotion migration of a virtual machine. The virtual machine is configured as follows: <vSphere Flash Read Cache (vFRC) enabled> <Is part of a Distributed Resource Cluster (DRS) Cluster> Which two statements are true? (Choose two.)___
A. Each ESXi host in the cluster supports multiple virtual flash resources.
B. Each ESXi host in the cluster supports one virtual flash resource.
C. DRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity to their current host and moves them only for mandatory reasons.
D. DRS treats powered-on virtual machines with Flash Read Cache as having a required affinity to their current host and does not move them.
【多选题】
An administrator is using the Host Failures to Tolerate Admission Control Policy for a vSphere High Availability ___ cluster. When configuring this setting on the cluster, the administrator sees this error message: <Insufficient resources to satisfy HA failover level on cluster > What are two likely causes for the error? (Choose two.)(AB)
A. The hosts in the cluster are disconnected.
B. A host in the cluster is displaying an HA error.
C.
D. istributed Resource Scheduler has not been configured on the cluster.
【多选题】
What are two ways to identify TCP/IP stack information? (Choose two.)___
A. Using the vSphere Web Client
B. Using esxcli network ip netstack
C. Using esxcfg-netstack
D. Using the vSphere Client
【多选题】
Which two actions are required when enabling vFlash Read Cache for a virtual machine's virtual disk? (Choose two.)___
A. A value in the Virtual Flash Read Cache text box must be entered.
B. A Flash Resource Pool for Cache size reservation must be entered.
C. The Device backing and the block size must be configured.
D. The
E. nable virtual flash host swap cache check box must be selected.
【多选题】
What two IT infrastructure components are virtualized by vSphere Essentials? (Choose two.)___
A. Networks
B. Applications
C. Storage
D. Management
【多选题】
When attempting to access a virtual machine, an administrator is unable to login using the vSphere credentials. What two options are probable causes of the authentication failure? (Choose two.)___
A. The vSphere credentials have not been granted permissions.
B. The vSphere credentials are granted read-only permissions.
C. The vSphere credentials are granted no-access permissions.
D. The vSphere credentials are not a member of the local administrator group.
【多选题】
An administrator is performing a scripted installation of ESXi 6.x. In which three locations does the script need to be? (Choose three.)___
A. PXE Server
B. HTTPS
C. FTP
D. NFS
E. VVOLs Datastore
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