Which statement is true about loop guard?()
A. Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.
B. Loop guard only operates on root ports.
C. Loop guard only operates on designated ports.
D. Loop guard only operates on edge ports.
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目前计算机中常用的数据不包含哪种类型?()
A. 用户定义的数据
B. 复合数据
C. 系统数据
D. 指令数据
It is not necessary to declare()in MARITIME HEALTH DECLARATION.
A. Jaundice by fever
B. Acute skin rash or eruption with or without fever
C. Duodeniti