【多选题】
An administrator logs into the vSphere Web Client, but is unable to see any hosts and clusters. Which two options could fix the problem? (Choose two.)___
A. Verify that the client web browser and vCenter Server are in the same broadcast domain.
B. Verify that the vCenter Server system is registered with the same Platform Services Controller as the vSphere Web Client.
C. Log in to the vCenter Server as a user within the Active
D. irectory domain.
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相关试题
【多选题】
Which three VLAN Tagging modes are available in vSphere 6.x? (Choose three.)___
A. External Switch Tagging
B. Private VLAN Tagging
C. Virtual Switch Tagging
D. VXLAN Tagging
E. Virtual Guest Tagging
【多选题】
Which two statements are true about VMFS5 datastores on ESXi 6.x? (Choose two.)___
A. Virtual Disk (VMDK) size can be larger than 2TB.
B. Datastore extent size can be larger than 2TB.
C. Only Physical Mode Raw
D. evice Map (Passthrough-RDM) can be larger than 2TB.
【多选题】
Which two statements are correct when turning off a Distributed Resource Scheduler (DRS) Cluster? (Choose two.)___
A. The resource pool hierarchy of the DRS cluster is maintained.
B. The resource pool hierarchy of the DRS cluster is removed.
C. The affinity settings of the
D. RS cluster are removed and not maintained when DRS is re-enabled.
【多选题】
An administrator is creating a new Virtual SAN cluster on a Layer 2 network. There is an existing Virtual SAN cluster on the same Layer 2 network. Which two actions would allow the new Virtual SAN cluster to coexist with the older cluster? (Choose two.)___
A. Change the default Multicast Address on the new Virtual SAN cluster.
B. Change the default Unicast Address on the new Virtual SAN Cluster.
C. Create a separate VLAN for each cluster.
D. Create an ARP Alias for the Virtual SAN VMkernel Network Adapter.
【多选题】
A vCenter Operations Manager 5.7 environment is upgraded to vRealize Operations. After the upgrade, the analytics services fail to start. Which three steps must be taken to resolve the problem? (Choose three.)___
A. Take the vRealize Operations cluster offline.
B. Delete the activity persistence files.
C. Bring the cluster back online.
D. Remove any unresponsive nodes.
E. Stop the CaSA service.
【多选题】
An organization has an ESXi 6.x host that contains two resource pools. The host is being relocated to a DRS cluster. What two actions can be taken to integrate the host into the cluster, and what would happen to the existing ESXi resource pool hierarchy as a result? (Choose two.)___
A. Place all of the host's virtual machines into the DRS cluster root resource pool. The resource pools present on the host will be deleted.
B. Create a resource pool for the ESXi host's virtual machines and resource pools. The resource pools present on the host will be deleted.
C. Place all of the host's virtual machines into the DRS cluster root resource pool. The resource pools present on the host will be preserved.
D. Create a resource pool for the
E. SXi host's virtual machines and resource pools. The resource pools present on the host will be preserved.
【多选题】
Which two parameters are required when adding an iSCSI target to an iSCSI Software Adapter using Dynamic Discovery? (Choose two.)___
A. The iSCSI device's IP Address or Fully Qualified Domain Name
B. The Port Number
C. The iSCSI device's iSCSI Qualified Name (IQN)
D. The Default Gateway IP Address
【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
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【单选题】
告警现象，客户侧传输设备脱管，客户侧传输设备的上游传输网元对应端口上报MS_RDI告警，表示（ ） ___
A. 客户侧传输设备单收客户侧传输设备的上游传输设备无光
B. 客户侧传输设备和客户侧传输设备的上游传输设备互收无光
C. 客户侧传输设备的上游传输设备单收客户侧传输设备无光
D. 客户侧传输设备停电
E.
F.
【多选题】
OLT双上联的机制有很多种，以下（ ）技术可以作为OLT双上联方式.___
A. 主控板保护
B. 以太网保护组
C. 链路聚合
D. ARP探测
E. Smart link&monitor link
F. BFD检测
【多选题】
下列哪三种说法正确描述了 PPP 身份验证. （ ）___
A. PAP 以明文发送。
B. PAP 通过三次握手建立链路。
C. PAP 可防护反复试验性攻击。
D. CHAP 通过双向握手建立链路。
E. CHAP 使用基于 MD5 哈希算法的询问/响应方法。
F. CHAP 通过重复询问进行检验。
【多选题】
下列BGP 属性属于公认必遵的是（ ）___
A. ORIGIN
B. AS_PATH
C. NEXT_HOP
D. MED
E. LOCAL_PREF
F. COMMUNITY
【多选题】
专线设备现场交维规范中，以下哪些要求符合规范___
A. 基站可以安装交流设备
B. A级专线的跳纤点数量不得超过3个，普通级专线的跳纤点不得超过4个
C. 专线交维是通过第170流程系统进行的
D. 移交资料中“纤芯资料表”不是必备的，“电路调单”是必备的。
E. AAA专线、专网汇聚点必须实现双路由
F. 业务保障等级为AAA、AA级专线的跳纤点不得超过2个（全业务机房/基站到客户端之间的中间跳纤节点数）
【多选题】
在ITU-T G.984.3 标准中主要定义哪些内容标准.( )___
A. GTC帧结构介绍
B. DBA规格要求
C. GTC复用结构及协议栈介绍
D. ONU注册激活流程
E. 告警和性能
F. GPON TC层规格要求
【多选题】
在ITU-T G.984.3 标准中主要定义哪些内容标准.（ ）___
A. ONU注册激活流程
B. 告警和性能
C. DBA规格要求
D. GTC复用结构及协议栈介绍
E. GPON TC层规格要求
F. GTC帧结构介绍
【多选题】
以下对于PON网络的描述正确的是（ ）___
A. PON是一个单纤双向的网络
B. PON是一种点到多点（P2MP）结构的无源光网络
C. GPON使用的标准是ITU-T G.984.x
D. PON上行使用的FDMA技术
E. PON是Passive Optical Network 的缩写
F. PON由光线路终端OLT（Optical Line Terminal）、光网络单元 ONU（ Optical Network Unit） 和光分配网络ODN（Optical Distribution Network）组成
【多选题】
PTN的采用的T-MPLS OAM的故障管理技术包括有（ ）___
A. 连续性检查（CC）
B. 环回（LB）
C. 告警指示（AIS）
D. 远程缺陷指示（RDI）
E. 锁定（LCK）
F. 测试（TST）
【多选题】
出现T_ALOS告警可能原因有（ ）。___
A. DDF架侧2M接口输出端口脱落或松动
B. 本站2M接口输入端口脱落或松动
C. DDF架侧2M接口输入端口脱落或松动
D. 基站停电
E. 光缆中断
F. 传输机房2M头松动
【多选题】
关于误码问题，常见设备原因有（ ）。 ___
A. 线路板接收侧信号衰减过大、对端发送电路故障、本端接收电路故障
B. 时钟同步性能不好
C. 交叉板与线路板、支路板配合不好
D. 支路板故障
E. 风扇故障
F. 单板失效或性能不好
【多选题】
在SDH中，开销可分为____和____两大类，段开销细分为____和____，通道开销细分为____和____。___
A. 段开销
B. 通道开销
C. 再生段开销
D. 复用段开销
E. 低阶通道开销（VC-12、VC-3中）
F. 高阶通道开销（VC-4）
【多选题】
网管的告警浏览中，可以看到所有网元上报的告警，每条告警元素包括哪些.（ ）___
A. 清除时间
B. 确认时间
C. 告警定位信息
D. 告警源
E. 告警发生时间
F. 告警名称
【多选题】
面向维护的验收交维主要包括 等工作( )___
A. 组网拓扑安全性梳理确认
B. 面向客户网管监控
C. 现场标签验收
D. 专线资料移交
E. 资源录入
F. 工程资料移交
【多选题】
ONU及其它硬件系统巡检中应检查项目为（ ）___
A. 检查ONU设备是否完好、能否正常使用
B. 检查设备标签是否合格
C. 检查ONU机柜通风系统是否正常工作
D. 检查ONU上行光缆标签及入户线缆标签是否齐全规范
E. 检查设备指示灯是否正常显示
F. 检查设备是否发出很大噪声
【多选题】
链路聚合（又叫快速以太网通道）是这样的，它把LAN交换机之间的多条链路组合起来，形成一条逻辑的高速以太网链路.但这些链路必须满足一定的条件，下面的哪些是必须满足的.（ ）___
A. 这些链路必须是FE或者GE，10M链路不能被聚合；
B. 这些链路必须工作在全双工模式；
C. 这些链路必须使用相同的链路层封装类型；
D. 如果这些链路作为TRUNK使用，那么每条链路上允许传送的VLAN必须一样；
E. 这些链路的物理介质必须一样，比如，UTP电缆和光纤不能捆绑在一起；
F. 这些链路的速率必须一样，比如，FE和GE不能捆绑在一起。
【多选题】
以下哪些属于防火墙的缺点()___
A. 防外不防内
B. 不能防范全部的威胁，特别是新产生的威胁
C. 在提供深度检测功能以及防火墙处理转发性能上需要平衡
D. 当使用端 - 端加密时，即有加密隧道穿越防火墙的时候不能处理
E. 防火墙本身可能会存在性能瓶颈，如抗攻击能力，会话数限制等
F.
【多选题】
下列关于 HDLC 封装的说法中哪三项正确. （ ）___
A. HDLC 支持 PAP 和 CHAP 身份验证。
B. Cisco 路由器上实现的 HDLC 是
C. isco 的专有技术。 C.HDLC 使用帧字符与校验和来指定同步串行链路上的数据封装方法。
D. HDLC 是 Cisco 路由器上的默认串行接口封装方法。
E. HDLC 和 PPP 相互兼容。 HDLC 不支持 CDP。
F. "
【多选题】
下面的光纤连接描述哪些是正确的（ ）___
A. 业务－OTUG－OMU－OBA－线路ODF
B. 调度ODF－OTUG－OMU－SDMT－线路ODF
C. 线路ODF－OLA－SDMR－线路ODF
D. 线路ODF－OPA－OAD－SDMT－线路ODF
E. 线路ODF－OPA－OSCT
F.
【多选题】
根据交换机处理 VLAN 数据帧的方式不同，H3C 以太网交换机的端口类型分为( )___
A. access 端口
B. trunk 端口
C. 镜像端口
D. hybrid 端口
E. monitor端口
F.
【多选题】
QoS旨在针对各种应用的不同需求，为其提供不同的服务质量，例如：提供专用带宽、减少报文丢失率、降低报文传送时延及时延抖动等。为实现上述目的，QoS提供了下述功能：（ ）___
A. 报文分类和着色
B. 网络拥塞管理
C. 网络拥塞避免
D. 流量监管和流量整形
E. QoS信令协议
F.
【多选题】
QoS旨在针对各种应用的不同需求，为其提供不同的服务质量，例如：提供专用带宽、减少报文丢失率、降低报文传送时延及时延抖动等.为实现上述目的，QoS提供了下述功能（ ）___
A. 报文分类和着色
B. 网络拥塞管理
C. 网络拥塞避免
D. 流量监管和流量整形
E. QoS信令协议
F.
【多选题】
以下查看历史性能路径哪些是正确的.（ ）___
A. “对象树”选项卡系统快捷菜单“历史性能”
B. x=H，bc=00时，表示为增量热补丁包
C. 菜单栏选项
D. “对象树”选项卡盘快捷菜单“历史性能”
E. “ONU列表”ONU快捷菜单“历史性能”
F.
【多选题】
专线工程部门提供的验收相关材料包含（ ）___
A. 集客末端设备现场照片
B. 《集团客户专线施工设计方案》
C. 《末端数据设备信息》文件
D. 《专线业务及联调测试报告》
E. 《集客专线项目健康度评估表》
F.
【多选题】
ISP分配给你一个115.64.4.0/22的地址块，以下那些地址是可使用的主机地址？___
A. 115.64.8.32
B. 115.64.7.64
C. 115.64.6.255
D. 115.64.3.255
E. 115.64.5.128
F.
【多选题】
光纤通信系统存在三个传输窗口____、____、____。其中零色散窗口波长为____，最小损耗窗口波长为____。___
A. 850nm
B. 1310nm
C. 1550nm
D. 1310n
E. 1550nm
F.
【多选题】
以下哪两个地址是192.168.15.19/28子网内的主机可用地址？___
A. 192.168.15.17
B. 192.168.15.14
C. 192.168.15.29
D. 192.168.15.16
E. 192.168.15.31
F.
【多选题】
ISP提供给你一个完整的B类地址，你需要创建至少300个子网络，并且每个子网至少支持50台主机。你可使用以下的那个子网掩码？___
A. 255.255.255.0
B. 255.255.255.128
C. 255.255.252.0
D. 255.255.255.224
E. 255.255.255.192
F.
【多选题】
当网上某站无法登录时，可能原因有（）___
A. 单站掉电
B. 与其它站没有光路连接（包括两个纤中只接了一纤）
C. 与其它站ID重复或ID号处于测试状态
D. 登录用计算机IP设置错（129.9.*.*）或与单站ID重复
E. DCC不通
F.
【多选题】
下面关于以太网交换机的叙述哪些是正确的（）___
A. 当交换机收到一单播帧时，如果该数据帧的目的地址在MAC地址表内，且目的地址对应的端口不同于接收到该数据帧的端口，则将该数据帧从目的地址所对应的端口发出.
B. 当交换机刚刚初始化以后，MAC地址表是空的，当交换机从它的某个端口接收到某个数据帧时，检查帧的源地址，如果该地址不在MAC地址表中，就把该源地址和该端口号加入到MAC地址表内
C. 当交换机收到一单播帧时，检查该数据帧的目的地址是否在MAC地址表内，当该目的MAC地址与接收帧位于同一端口上，则丢弃该数据帧hcne最新题库2007年8月8日整理
D. 当交换机收到一单播帧时，如果该数据帧的目的地址不在MAC地址表内，则将该数据帧从除了接收到该帧的端口之外的所有端口发出
E. 当交换机收到一广播帧时，直接将该数据帧从除了收到该帧的端口之外的所有端口发出
F.
