G is a tree, then G's spanning tree has ( ) tree. A: 1 B: 0 C: 2 D: I'm not sure

生成树协议(Spanning Tree Protocol)的主要作用是什么?( )

Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)

Catalyst 3500(Cisco IOS系统)中配置UplinkFast生成树可选功能的命令格式是——。 A: set spantree uplinkfast enable B: set spantree uplinkfast enable rate C: spanning—tree vlanroot primary D: spanning—tree uplinkfast·

Under which two circumstances should Spanning Tree Protocol be implemented？ （） A:  to ensure a loop-free topology B:  to protect against user-side loops C:  when a VLAN spans access layer switches D:  for the most deterministic and highly available network topology E:  because of the risk of lost connectivity without Spanning Tree Protocol

【CH04】下面哪个用来分隔广播域？ A: 生成树（Spanning Tree ，STP) B: IEEE802.1D C: 虚拟局域网（Virtual LAN） D: 上述答案都不对

__________ in Athens was considered sacred. A: Pine tree B: Olive tree C: Willow tree D: Cypress tree

Which of the following plants is sacred to Apollo？ （ ）。 A: Moly B: Laurel tree C: Oak tree D: Olive tree

​Just in front of our house________ with a history of 1,000 years.‎ A: does a tall tree stand B: stands a tall tree C: a tall tree is standing D: a tall tree stands

枯藤老树昏鸦() A: Withered vine, an old tree, a fainted crow. B: Withered vine, an ancient tree, crows at dusk. C: yellow<br/>vine, old tree and fainted crow. D: yellow vine, old tree and fainted crow.