NGS系统有三个指示灯指示NGS的状态,下列分析正确的是()
A. 蓝色灯亮表示系统失效
B. 琥珀色灯亮表示性能降低,系统需要维护
C. 飞机上电后,如果所有的灯都不亮,则表示该指示系统正常
D. 如果所有的灯都不亮,则表示该指示系统失效,需按照BITE方法进行排故
Which of the following is not an essential prerequisite for AutoQoS to be correctly applied to an interface()
A. The interface must be configured as a Multilink PPP interface.
B. The correct bandwidth should be configured on the interface.
C. A QoS policy must not be currently attached to the interface.
D. CEF must be enable
E. AutoQoS must be enabled globally before it can be enabled on the interface.
F. An IP address must be configured on the interface if its speed is equal to or less than 768 kbps.
预探井部署的基本原则是;从()和()着眼;,并以()或()作为具体解剖对象。
从观察窗中看到符合水准气泡影象错动间距较大时,需()使符合水准气泡影象符合。
A. A.转动微倾螺旋;
B. B.转动微动螺旋;
C. C.转动三个螺旋