2. 计算机
  3. Refer to the exhibit．A problem with network connectivity has been observed．It is suspected that the cable connected to switch po

Refer to the exhibit．A problem with network connectivity has been observed．It is suspected that the cable connected to switch po

admin2019-04-08  51
问题 Refer to the exhibit．A problem with network connectivity has been observed．It is suspected that the cable connected to switch port Fa0/9 on Switch 1 disconnected．What would be an effect of tis cable being disconnected?
选项 A、        Host B would not be able to access the server in VLAN9 until the cable is reconnected
B、        For less than a minute ,Host B would not be able to access the server in VLAN9．Then normal network function would resume．
C、        Communication between VLAN3 and the other VLANs would be disabled
D、        The transfer of files from Host B to the server in VLAN9 would be significantly slower．
答案B
解析 图中交换机存在环路，有一个端口会处于堵塞状态。当F0/9 down之后，STP重新计算，在汇聚之前VLAN3不能访问VLAN9，端口汇聚之后恢复正常。
D说hostB访问VLAN 9中的server会变慢。不同vlan之间的通信需要通过网关转发，并不是switch1直接转发给switch3，所以这里访问速度不会变。
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