Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）

A .  The access layer is the first oversubscription point in a data center design. B .  When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer. C .  When using a Layer 2 looped design， VLANs are not extended into the aggregation layer. D .  When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer. E .  The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.

A . Applying license keys to the hardware subsystem B . Connecting a secondary storage unit to the storage complex C . Importing and exporting storage subsystem configurations D . Defining userids and passwords for use in the real subsystem

A . R1（config-route-at）# B . R1（config-route-map）# C . R1（config-it）# D . R1（config-vrf）# E . R1（config）# F . R1（router）#

A . user EXEC mode B . global configuration mode C . privileged EXEC mode D . auxiliary setup mode

A . The backup will consist of used data blocks only. B . The database must be shut down to accomplish the backup. C . The backup can be accomplished without shutting down the database. D . The backup will contain all database files that have never been backed up.

A .  Archive log generation is suspended until the tablespaces are taken out of hot backup mode.  B .  Datafiles are not written to during hot backups. C .  Changes to the database are cached during the backup and not written to the datafiles to ensure that the datafiles are consistent when recovered. D .  The datafile headers are not updated during the backup. E .  The way data is written to the online redo logs is unchanged during the backup.

A . You find that one of the redo log members in each redo log group is lost. B . You find that a data file that belongs to the USERS tablespace is damaged. C . You find that a data file that belongs to the SYSTEM tablespace is damaged. D . You find that the current redo log group is damaged and is not available for recovery. E . You realized while performing a recovery that an archived redo log file needed for recovery is lost.

A . Blocking B . Auto C . Desirable D . On E . Transparent F . Learning

A . Restore the data file and perform incomplete recovery. B . Restore the data file and perform point-in-time recover. C . Drop the tablespace and lose all data in the tablespace. D . Restore the database and lose all data since the last backup.

A . The data files can be recovered till the last committed transaction. B . The data files can be recovered without shutting down the database. C . The data file is taken offline automatically； the database remains open. D . The data files can be recovered to the time of the most recent backup.

A .  alter database archivelog B .  alter system enable archivelog mode C .  alter database enable archive D .  alter database archivelog enable E .  None of the above

A . adding a new user to the database B . dropping a user from the database C . dropping a table from the database D . dropping a data file from a tablespace E . adding a new tablespace to the database

A . dead band action B . neutral zone action C . range D . on-off actio

A .  line timing B .  loop timing C .  internal timing D .  through timing E .  external timing

A . The destination must be global only. B . A maximum of five destinations can be assigned. C . A maximum of ten different destinations can be assigned. D . All the destinations are determined by the server automatically. E . The destination may be local or remote for a Standby Database. F . The destination can be changed by setting the LOG_ARCHIVE_FORMAT initialization parameter.

A . syslog logging B . terminal logging C . buffered logging D . console logging

A . line timing B . loop timing C . internal timing D . through timing E . external timing

A . modifying the configuration of an online domain B . modifying the configuration of an offline domain C . viewing runtime performance data in ONLINE mode D . viewing runtime performance data in OFFLINE mode E . creating and extending domai

A .  The physical port can be used as part of a Shared Ethernet Adapter （SEA）. B .  All physical ports on the Host Ethernet Adapter （HEA） default to promiscuous mode. C .  Multiple logical ports can be assigned to a physical port if that logical port is in promiscuous mode. D .  All physical ports that belong to the same port group will be set to promiscuous mode on the Host Ethernet Adapter （HEA）.

A . It does not support all underlying unicast routing protocols like GBP B . It supports shared trees only assuming all hosts want the multicast traffic C . Receivers are registered with RP by their first-hop router D . Receivers are joinedto the Shared Tree（rooted the rp ）by their local Designated Router（DR） E . From the RP，traffic flows down a Source Tree to each receiver

A．Reminding B．Questioning C．Correcting D．Rewriting 此题为多项选择题。