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

最多可以添加几个子接口（） A: 4094 B: 4048 C: 4049 D: 4084

VLANID的取值范围是（） A: 1~1000 B: 1~4094 C: 0~4095 D: 1~4096

对于一个B类网络，可以分配______个主机地址。 A: 1022 B: 4094 C: 32766 D: 65534

【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