对于PPPoE协议，以下描述正确的有（）____答案

【多选题】

对于PPPoE协议，以下描述正确的有（）___

A. 主要用于用户计算机和BAS之间的通信

B. 通信双方都需要支持PPPoE协议

C. PPPoE认证中，认证方式主要有PAP认证和CHAP认证

D. PPPoE分为发现阶段和PPP会话阶段

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下列描述正确的是（）___

A. IGMP是Internet组管理协议，它用来把一个UDP数据包多播到多个主机

B. ICMP是Internet控制报文协议用于在IP主机、路由器之间传递控制消息

C. 网桥的好处是为不同类型的物理网络提供连接：以太网、令牌环网、点对点的链接和FDDI

D. FTP是一种应用层协议，TCP是一种运输层协议，IP是一种网络层协议

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在路由过程中，数据报文的那些内容不会改变（）___

A. 源IP

B. 目的IP

C. 目的MAC

D. IP层以上的内容

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【多选题】

从传播方式上来讲，数据报文分为（）___

A. 广播报文

B. 单播报文

C. 组播报文

D. 业务报文

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【多选题】

关于IP路由的说法，以下正确的有（）___

A. 路由是OSI模型中第三层的概念

B. 任何一条路由都必须包括如下三部分的信息：源地址、目的地址和下一跳

C. 在局域网中，路由包括了以下两部分的内容：IP地址和MAC地址

D. IP路由是指导IP报文转发的路径信息

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使用VLAN具有以下优点（） ___

A. 控制广播风暴

B. 提高网络整体的安全性

C. 网络管理简单

D. 易于维护

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【多选题】

VLAN的划分方式有哪些（）___

A. 基于端口的VLAN

B. 基于MAC地址的VLAN

C. 基于协议的VLAN

D. 基于子网的VLAN

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【多选题】

划分VLAN后交换机的端口类型有以下哪几种？（）___

A. Access

B. Trunk

C. Mirror

D. Hybrid

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【多选题】

关于VLAN的一些特点，描述正确的是： ( )___

A. 网络的增加,移动和改变,只需要在适当的VLAN中配置合适的端口

B. 不同VLAN的用户不能互相通信,除非依靠router来做VLAN间的通信

C. 不同VLAN间用户可以直接进行通信，无须借助其他网络设备

D. VLAN增加广播域的数量,而减小广播域的大小

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网络故障原因可能有（）___

A. 病毒

B. 机房设备问题

C. 线路问题

D. 以上均不可能

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常用的家庭宽带故障处理方法有（ )___

A. 排除法

B. 替换法

C. 分段测试法

D. 告警、日志分析法

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用户PC本地连接显示红叉下面可能的原因是：（）___

A. 线路故障，如连接网线松动、水晶头损坏等

B. 光猫断电

C. 光猫端口故障

D. 用户计算机故障

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在故障检测中，哪些工具可以帮助用来检测连通性？（）___

A. PING

B. TRACERT

C. IPCONFIG

D. SHOW VERSION

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【多选题】

PC机PING不通路由器的网关地址可能因为 ( )___

A. 访问控制列表

B. IP地址冲突

C. 防火墙软件

D. 路由器上路由错误

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出现Ping丢包现象，就会发生（）___

A. 上网断线

B. 网页打开缓慢

C. 发送接收邮件速度慢

D. 视频卡顿

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PPPOE 拨号上网，BRAS 返回678错误，可能原因（）___

A. vlanid 冲突而导致

B. 端口数据未做

C. 通道未建立

D. ONU设备掉电

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【多选题】

常见的宽带故障提示678错误，可能存在的原因是（）___

A. MODEN故障

B. 线路故障

C. 网卡故障

D. 帐号密码不对

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PPPOE 拨号上网，BRAS 返回691错误的故障原因有哪些？（）___

A. 用户网线故障

B. 帐号和密码错误

C. 帐号绑定或吊死

D. 用户猫衰减过大

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拨号故障代码691，以下可能的原因是（）___

A. 链路故障

B. 账号过期或已欠费

C. 设备或端口故障

D. 账号密码错误

E. 账号和端口对应关系错

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拨号通过连接，但所有网页打不开，具体原因是（）___

A. 终端假死

B. 浏览器设置问题

C. 浏览器设置了代理服务器

D. 设置了不正确的DNS

E. 用户路由器不好

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能够上QQ不能打开网页一般是因为（）___

A. DNS设置错误

B. 浏览器故障

C. 代理设置错误

D. 网线不通

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上网打不开网页的原因可能是（）___

A. 浏览器设置问题

B. 使用路由器设置出错

C. 客户IP或DNS问题

D. 互联互通问题

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用户时有遇到上网速度慢的现象，以下哪些原因可能引起上网速度慢（）___

A. 被访问的服务器太忙

B. 用户终端设备(即电脑)性能

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D. 用户使用其它与操作系统兼容有问题的拨号软件

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可能导致用户网速慢的原因有（）___

A. 电磁干扰

B. 对方服务器忙或者限制

C. 计算机感染病毒

D. 计算机硬件配置较低

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可能引起用户上网掉线的原因有（）___

A. 线路距离过长

B. 网卡问题

C. 拨号软件冲突

D. 电磁串扰

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当计算机或手机不能打开路由器的管理配置界面时，下列哪些操作是正确的（）___

A. 检查网卡的上网方式，并将其设置为自动获得IP地址

B. 在命令提示符操作界面中输入：ipconfig，查看网卡及网关的IP地址，并核实网卡地址是否与网关地址在相同网段，以及浏览器中访问的IP地址是否与网关的IP地址一致

C. 将网卡设置为固定IP地址192.168.1.X，再在浏览器中国输入192.168.1.1访问配置界面

D. 当检查发现网卡自动获得地址为169.254.X.X时，可尝试重启网卡，并将路由器回恢复出厂设置，再进行访问

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城域网分为（）三个层次。___

A. 核心层

B. 汇聚层

C. 接入层

D. 骨干层

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接入网按其所用传输介质的不同分为哪几类（）。___

A. 铜线接入网

B. 光纤接入网

C. 混合接入网

D. 无线接入网

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有线接入技术中，包括（）接入方式___

A. EOC

B. POE

C. PLC

D. CAT.5

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接入网的拓扑结构包括（）。___

A. 星型结构和双星型结构

B. 总线结构（链型或T型结构）

C. 环型结构

D. 树型结构

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光纤接入的应用模式有（）___

A. FTTH

B. FTTO

C. FTTB

D. FTTC

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光纤宽带的主要优点有（）___

A. 传输容量大

B. 传输距离远

C. 抗干扰性能好

D. 弯曲半径小

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光纤通信的缺点是( )。___

A. 光纤性质脆，需加适当涂覆予以保护

B. 分路耦合不方便

C. 不能传送中继器所需电能

D. 弯曲半径不宜太小

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作为有线网络的传输介质，光纤和双绞线相比有哪些优势？（）___

A. 光纤比双绞线便宜

B. 光纤抗干扰性高于双绞线，不容易被干扰

C. 传输的距离更远

D. 可以支持更高的速率

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光纤按照光纤模式分类,可分为（）___

A. 单模

B. 多模

C. 裸光纤

D. 塑料光纤

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光纤收发器按光纤来分,可以分为( )___

A. 单纤

B. 双纤

C. 多模

D. 单模

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以下哪些选项会造成光纤线路衰减过大（）___

A. 光纤老化

B. 连接器未清洁

C. 接头受潮

D. 传输距离过远

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光纤连接方法主要有（）___

A. 永久性连接

B. 应急连接

C. 活动连接

D. 特殊连接

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【多选题】

下面对FTTx的中文解释正确的是（）___

A. FTTB是指光纤到大楼

B. FTTH是指光纤交接箱

C. FTTC是指光纤到路边

D. FTTH是指光纤到户

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PON系统主要的组网方式有（）。___

A. 环型

B. 树型

C. 总线型

D. 星型

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【多选题】

PON系统中常用的分光器有（）___

A. 1：4

B. 1：6

C. 1：32

D. 1：64

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Assuming a mirrored (RAID-1) object configuration, how many hosts must contribute storage in a non-stretched VMware vSAN cluster to satisfy the “Number of failures to tolerate” policy option?“n” is the desired “Number of failures to tolerate” value for all options.___

A. 2n+2

B. 2n

C. 2n+1

D. 3n

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【单选题】

An administrator must change the statistics level for short-term performance monitoring and wants to collect metrics for all counters, excluding minimum and maximum rollup values. What would be the statistics level?___

A. Level 3

B. Level 1

C. Level 2

D. Level 4

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In a vSphere environment, two resource pools are created as shown in the Exhibit. Each VM is configured with 1 GB of memory. When the administrator tried to power on VM3, the operation failed. What action in the resource pool settings will allow VM3 to power on successfully?___

A. Deselect Expandable Memory Reservation

B. Increase Memory Reservation

C. Deselect Expandable CPU Reservation

D. Increase the CPU Reservation

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【单选题】

Which network is used by vSphere HA when VMware vSAN is enabled?___

A. Management network

B. vSphere Replication network

C. vMotion network

D. VSAN network

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Which statement is correct when migrating from a Windows vCenter Server to the vCenter Server Appliance 6.5?___

A. Migration deployments do not migrate local OS users from the source vCenter Server.

B. Migration deployments support DHCP on the source vCenter Server.

C. Migration deployments allow the source vCenter Server to remain powered on afterwards.

D. Migration deployments support custom ports for all services on the source vCenter Server.

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How can failback of a recovered virtual machine in vSphere Replication be performed?___

A. No action required, because failback is automatically performed to the source site.

B. Configure a new replication in the reverse direction at the target site.

C. Disable or Stop the virtual machine replication on the source site.

D. Power off and unregister the virtual machine on the target site.

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【单选题】

After upgrading the vSphere infrastructure and VMware Tools to version 6.5, the “Upgrade VM Compatibility” option is grayed out in the vSphere Web Client. (See Exhibit.) What must the administrator do to enable the VM compatibility upgrade?___

A. VMware Tools should be upgraded last.

B. Restart the ESXi server.

C. Uninstall VMware Tools.

D. Power off the virtual machine.

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What availability mode does vCenter HA provide?___

A. Active-Passive

B. Active-Standby

C. Active-Active

D. Load-balanced

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In which scenario will vSphere DRS balance resources when set to Fully Automated?___

A. Hosts with only shared storage

B. Hosts are part of a vSphere HA cluster

C. Power Management is set to Balanced on hosts

D. Hosts with shared or non-shared storage

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【单选题】

What VMware technology can be used to move physical servers to the vSphere infrastructure?___

A. VMware vMotion

B. VMware Converter

C. VMware vCenter Server

D. OVF transport

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【单选题】

Upgrading vCenter Server with Microsoft SQL database fails with the following error message: The DB User entered does not have the required permissions needed to install and configure vCenter Server with the selected DB. Please correct the following error(s): %sWhat could cause this error?___

A. incorrect ports open on SQL Server

B. incorrect database on the SQL server

C. incorrect compatibility mode on the SQL server

D. incorrect permission on SQL Server database

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【单选题】

What is a potential downside of having more than four paths per datastore?___

A. limits the storage protocols

B. increases storage latency for VM

C. limits the path selection policies

D. limits the number of LUNs per host

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【单选题】

Which feature facilitates the sharing of templates via vCenter Server?___

A. Content Library

B. OVF

C. folders

D. vApp

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A vSphere Administrator is in the process of configuring replication for a virtual machine, but is not able to select the Recovery Point Objective (RPO) value of 5 minutes. Which statement could explain why the RPO value cannot be lower than 15 minutes?___

A. The OS quiescing option is selected for Replication options.

B. The virtual machine hardware version is not compatible.

C. The target and source sites use different types of datastores.

D. The target and source sites are not using VMFS 6.0 datastore.

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【单选题】

What advanced parameter defines a custom isolation IP address for a vSphere HA cluster?___

A. das.usedefaultisolationaddress

B. das.isolationshutdowntimeout

C. fdm.isolationpolicydelaysec

D. das.isolationaddress

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Which method is supported for backing up the virtual machine that contains vCenter Server?___

A. differential

B. incremental

C. full image

D. individual disks

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A vSphere Administrator must ensure that a user is able to view and manage the system configuration in vSphere Web Client. In the vCenter Single Sign-On domain, which group should the user be a part of?___

A. SystemConfiguration.BashShellAdministrators

B. ComponentManager. Administrators

C. Administrators

D. SystemConfiguration.Administrators

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【单选题】

What is the minimum number of hosts that must contribute capacity to a non-ROBO single site VMware vSAN cluster?___

A. 1

B. 64

C. 3

D. 2

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【单选题】

Which guest operating system supports PVRDMA?___

A. Windows (32-Bit)

B. Linux (32-Bit)

C. Windows (64-Bit)

D. Linux (64-Bit)

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【单选题】

What is the correct way to replace the certificate on an existing vCenter Server that is part of a vCenter HA configuration?___

A. Put the vCenter HA in Maintenance mode, replace the certificate, exit Maintenance mode.

B. Shut down Passive and Witness nodes and replace the certificate on the Active node.

C. Remove the Passive and Witness nodes, replace the certificate, reconfigure the cluster.

D. Replace the certificate while all nodes are participating in the cluster.

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【单选题】

The vSphere Data Protection performance analysis results in the “Conditionally Passed” status. What can cause this condition?___

A. The results did not meet the minimum performance expectations.

B. The read, write, and seek tests were successful.

C. The read and write tests were successful but the seek test failed.

D. The read and write tests were successful but the seek test skipped.

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【单选题】

A vSphere Administrator wants to reserve 0.5 Gbps for virtual machines on each uplink on a disturbed switch that has 10 uplinks. What is the quota that should be reserved for the network resource pool?___

A. 10 Gbps

B. 5 Gbps

C. 100 Gbps

D. 0.5 Gbps

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【单选题】

A vSphere administrator manages a cluster which includes critical and non-critical virtual machines. The cluster requires different permissions for contractors and non-contractors. How can the administrator exclude the contractor group from some of the critical VMs?___

A. Apply permission for both contractors and non-contractors on the cluster level.

B. Apply permission for both contractors and non-contractors on the cluster level. Remove permission on the critical VMs for contractors.

C. Remove permission for contractors on the cluster level. Apply permission on the critical VMs for noncontractors.

D. Apply permission for both contractors and non-contractors on the VMs. Remove permission on the critical VMs for contractors.

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【单选题】

In an ESXi 6.5 cluster only "NFS datastore has running or registered virtual machines" returns. A vSphere HA cluster with four hosts has admission control configured to tolerate one host failure. Which statement is true if a fifth host is added?___

A. CPU and Memory capacity will be set to 50%.

B. CPU and Memory capacity will be set to 30%.

C. CPU and Memory capacity will be set to 25%.

D. CPU and Memory capacity will be set to 20%.

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【单选题】

Which command can be run to troubleshoot connectivity problems with vmkernal network interfaces?___

A. esxcli network

B. vmkping

C. net-status

D. vicfg-vmknic

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【单选题】

What counter should an administrator check to determine if a virtual machine is ballooning?___

A. swapinRate

B. vmmemctltarget

C. swapped

D. vmmemctl

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【单选题】

By default, how often is the vCenter vpx user password automatically changed?___

A. 15 days

B. 60 days

C. 30 days

D. 45 days

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【单选题】

Which metric in the Exhibit would identify high latency for a virtual machine operating system?___

A. QAVG/cmd

B. KAVG/cmd

C. DAVG/cmd

D. GAVG/cmd

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【单选题】

What VM Monitoring setting would ensure that the failure interval for a virtual machine is defined as 120 seconds?___

A. High

B. Normal

C. Low

D. Medium

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【单选题】

The business managers have asked the IT administrator to ensure configuration compliance in the vSphere infrastructure. The IT administrator wants to use Host Profiles to accomplish this, but is unable to do so. Why is the administrator unable to use Host Profiles?___

A. The infrastructure uses a vSphere Standard license.

B. The infrastructure has servers with various CPU families.

C. The user has only the “Administrator” role.

D. Host Profiles apply only to storage settings.

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【单选题】

What is the result of a “Consolidate” action on a virtual machine?___

A. All snapshots on the virtual machines will be deleted.

B. The virtual machine will be reverted to its last snapshot.

C. Redundant delta disks will be combined and deleted.

D. A new snapshot with memory state will be created.

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【单选题】

A Telco customer is implementing NFV using vSphere as the virtualization platform. Which feature can help achieve a high packet rate with lower CPU consumption?___

A. Network I/O Control

B. SplitRX

C. ERSPAN

D. LACP

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【单选题】

What is the VMware-recommended best practice for Fibre Channel zoning?___

A. soft zoning

B. single-initiator-multiple-target zoning

C. single-initiator zoning

D. single-initiator-single-target zoning

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【单选题】

How can a vSphere administrator ensure that a set of virtual machines run on different hosts in a DRS cluster?___

A. Use a VM-Host affinity rule.

B. Add the VMs to a vApp.

C. Use a VM-VM affinity rule.

D. Place the VMs in different folders.

查看答案解析

【单选题】

vCenter Server Appliance Instance can be backed up using which Client Interface?___

A. vSphere Client Interface

B. vSphere Web Client Interface

C. VMware Host Client Interface

D. Virtual Appliance Management Interface

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【单选题】

What tool can capture network traffic at the uplinks, or vSwitch, or virtual port levels?___

A. tcpdump-uw

B. wireshark

C. pktcap-uw

D. pcap

查看答案解析

【单选题】

Which storage feature always requires the use of third-party software on ESXi?___

A. Hardware Acceleration for NAS devices

B. VVOL

C. Hardware Acceleration for Block

D. evices

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【单选题】

An ESXi host's VMCA-Signed certificate has expired. How can the certificate be renewed?___

A. In the vSphere Web Client, browse to the host in question. Click the Manage tab and select settings. Select System and click Certificate, then click the Renew button.

B. In the vSphere Web Client, browse to the host in question. Click the Manage tab and select settings. Select System and click Certificate, then click the Refresh CA Certificates button.

C. Run the command /sbin/generate-certificates on the affected host.

D. Disconnect the host from vCenter Server and reconnect it.

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【单选题】

Which is the correct order for upgrading vSphere components?___

A. vCenter Server, ESXi hosts, VMware Tools, Virtual Machine hardware

B. VMware Tools, Virtual Machine hardware, ESXi hosts, vCenter Server

C. vCenter Server, Virtual Machine hardware, VMware tools, ESXi hosts

D. ESXi hosts, vCenter Server, Virtual Machine hardware, VMware Tools

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【单选题】

Which iSCSI initiator type can be used with any network interface card?___

A. Software iSCSI initiator

B. Software FCoE adapter

C. Hardware Independent iSCSI initiator

D. Hardware Dependent iSCSI initiator

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