点对点的连线方式具有网络架构简单、所用设备简单、()等优点。
A、没有特定服务器
B、架设成本高
C、所用设备不易购买
D、操作复杂
下面程序的输出是什么()。
A、342
B、3423
C、34234
D、323
You have enabled backup optimization for the RMAN environment.Identify two criteria on which RMAN will skip the file, if it has already been backed up.()
AThe data file backup is done with multiple channels
BThe data files is in the read-write mode after being backed up in the read only mode
CThe backup was taken after the data files was taken offline-normal or is in the read only mode
DThe data file backup complies with the back retention policy and the backup duplexing feature
以下选项中,不属于面向连接的网络服务的工作阶段的是()。(网络协议)
A、呼叫建立
B、数据传输
C、负载均衡
D、呼叫终止
电缆线径应考虑统一环路设计,基本线径可采用()。
A、0.4mm
B、0.5mm
C、0.6mm
D、0.7mm
子管在人(手)孔内应伸出适宜的长度,可为()mm。
A、100~200
B、200~400
C、300~500
D、400~600