将交换机的端口生成树成本设置为30,使用以下哪个命令? A: scitc(config)#spanning-treecost30 B: scitc(config-if-fastethernet0/1)#spanning-treecost30 C: scitc(config)#spanning-treepriority30 D: scitc(config-if-fastethernet0/1)#spanning-treepath-cost30

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·

The Great Gatsby has been the basis for numerous films of the same name, spanning nearly 90 years; and an upcoming 2013 adaptation.

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

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

【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

The European Union: A: Is a large labor union spanning across all of Europe; B: Is a famous Internet Provider in Europe; C: Is a group of European countries with a joint central government and currency; D: Is a trading bloc identical to ASEA

Pro/ENGINEER WF5.0软件中，拔模特征拔模角度的范围是: [-30°，30°]|[-30°，30°）|（-30°，30°]|（-30°，30°）