![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
Set的主要实现包括HashSet及TreeSet。
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
set spantree enable[vlan] (1)
set spantree fwddelay delay[vlan] (2)
set spantree hello interval[vlan] (3)
set spantree maxage agingtime[vlan] (4)
set spantree portcost mod_num/port_num cost (5)
B、TreeSet采用有序的平衡二叉树来实现Set接口
C、HashSet采用维护有序数组的方法来实现Set接口
D、TreeSet采用二叉树来实现Set接口
A.set spantree uplinkfast enable
B.set spantree uplinkfast enable rateamp;$lt;cr>
C.spanning—tree vlanroot primary
D.spanning—tree uplinkfast·
A.spanning-tree vlanroot primary
B.spanning-tree vlanroot secondary
C.set spantree root
D.set spantree root secondary
A.spanning—tree vlan
B.no spanning—tree vlan
C.set spantree enable
D.set spantree disable
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