When issuing the CROSSCHECK command in RMAN， if a backup file CANNOT be found， to what status is that file set？（） DELETED。 OBSOLETE。 EXPIRED。 UNKNOWN。
What is the best way to ensure that IKE/ISAKMP packets are not dropped when QoS is enabled on the uplink interface of the Teleworker router?（） QoS and IPSec should never be used together. 。 IKE/ISAKMP packets are DiffSERV codepoint CS6, so the traffic is never dropped.。 Source IKE/ISAKMP packets off the loop-back address. 。 Classify IKE/ISAKMP packets so they are appropriately prioritized.。
高处作业分为4个等级，高度在2～5m时，为（）级高处作业。 一。 二。 三。 特。
简述计算机硬件与软件的关系。
常用的固体润滑剂有
In order to avoid misconnections due to a failed node in a Bidirectional Line Switched Ring (BLSR), Alarm Indication Signals (AISs) are sent on every channel normally terminating in that node. What is the name of this process?（）
