单项选择题 Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?（）

单项选择题 Refer to the exhibit. At the end of an RSTP election process, which access layer switch port will assume the discarding role?（）

多项选择题 Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? （）