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[单选] Which one of the following is the most commonly used layer 2 network device?()

A . Hub
B . Bridge
C . Switch
D . Router
E . Repeaters
F . None of the above

党委(党组)在党内监督中负主体责任,()是第一责任人,党委常委会委员(党组成员)和党委委员在职责范围内履行监督职责。() 书记。 行政主要负责人。 神权政治(theocracy) You are the network administrator for The network consists of a single Active Directory domain named All network servers run Windows Server 2003. You are directed to back up all files in folder named c:\Data on one of the servers. You use the Backup utility to perform a normal backup of c:\Data. When the backup is complete, you review the backup log file and discover the following message: "WARNING: Portions of '\Data\Letter.doc' cannot be read. The backed up data is corrupt or incomplete. This file will not restore correctly" You need to ensure that all documents in c:\Data can be restored successfully. What should you do?() In the Backup utility, specify an incremental backup. Run the backup again.。 In the Backup utility, clear the Disable volume shadow copy option. Run the backup again.。 In the attribute properties of c:\Data\Letter.doc, select the File is ready for archiving option. Run the backup again.。 In the Offline settings dialog box of c:\Data, select the All files and programs that users open from the share will be automatically available offline option. Run the backup again.。 简述陆地生物群落类型及其动物的特征变化。 设备运杂费由下列各项构成() 运费和装卸费。 包装费。 设备供销部门的手续费。 采购与仓库保管费。 设备购置费。 Which one of the following is the most commonly used layer 2 network device?()
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