Which three roles

第1题：

第2题：

Which three statements about RSTP aretrue?（）

• A、RSTP significantly reduces topology reconverging time after a link failure.
• B、RSTP expends the STP port roles by adding the alternate and backup roles.
• C、RSTP portatates are blocking,discarding,learing,orforwarding.
• D、RSTP also uses the STP proprsal-agreement sequence.
• E、RSTP use the same timer-baseed process as STP on point-to-point links.
• F、RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

第3题：

第4题：

A redaction policy was added to the SAL column of the SCOTT.EMP table: All users have their default set of system privileges. For which three situations will data not be redacted?（）

• A、SYS sessions, regardless of the roles that are set in the session
• B、SYSTEM sessions, regardless of the roles that are set in the session
• C、SCOTT sessions, only if the MGR role is set in the session
• D、SCOTT sessions, only if the MGR role is granted to SCOTT
• E、SCOTT sessions, because he is the owner of the table
• F、SYSTEM session, only if the MGR role is set in the session

第5题：

Which of the following server roles synchronizes time throughout the network？（）

• A、DNS
• B、NTP
• C、DHCP
• D、SMTP

第6题：

Which two RSTP port roles include the port as part of the active topology？（）

• A、root
• B、designated
• C、alternate
• D、backup
• E、forwarding
• F、learning

第7题：

Which of the following describes the roles of devices in a WAN (Choose three.)（）。

• A、A CSU/DSU terminates a digital local loop.
• B、A modem terminates a digital local loop.
• C、A CSU/DSU terminates an analog local loop.
• D、A modem terminates an analog local loop.
• E、A router is commonly considered a DTE device.
• F、A router is commonly considered a DCE device.

第8题：

第9题：

Which of the following server roles provides a common time to all computers？（）

• A、NTP
• B、SNMP
• C、SMTP
• D、RAS

第10题：

Which two statements are true about the roles in the Oracle database？（）

• A、A role can be granted to itself.
• B、Roles are owned by the SYS user.
• C、Roles can be granted to other roles.
• D、A role cannot be assigned external authentication.
• E、A role can contain both system and object privileges.