Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true (Choose two.)()。
A. Router C will use ICMP to inform Host 1 that Host 2 cannot be reached
B. Router C will use ICMP to inform Router B that Host 2 cannot be reached
C. Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached
D. Router C will send a Destination Unreachable message type
E. Router C will send a Router Selection message type
F. Router C will send a Source Quench message type
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信息系统构建的三大要素不包括()。
A. 接口
B. 实现
C. 部署
D. 消息
小组教学形式指把一个班从教学需要出发暂时分成几个小组进行教学。既可按不同程度的学生分组,也可按学生的兴趣分组,还可混合编组。小组人数的确定,根据教学任务不同而有差异。
A. 正确
B. 错误
短距离移动气瓶,最好使用()。人工搬动气瓶,应手搬(),转动(),不可拖拽、()或用脚蹬端。