ccna v104.4题库疑问

chengangshenyan · 发表于 2011-6-23 17:01:14

本帖最后由 fulltimes 于 2011-6-23 18:07 编辑

QUESTION 435
Which three statements accurately describe layer 2 Ethernet switches?(choose three)
A. Microsegmentation decreases the number of collisions on the network.
B. if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.
C. Spanning Tree Protocol allows switches to automatically share vlan information.
D. In a properly functioning network with redundant switched paths,each switched aegment will contain one
root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have
only one root port.
E. Establishing vlans increases the number of broadcast domains.
F. Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3
address information.
Answer: ADF
Explanation/Reference:
A为分割减少冲突的数量，这里是冲突并不是冲突域，正确
B收到未知目的帧会产生泛洪
C这是vtp的特性，不是stp的
D在一个能够正常运行的网络冗余交换路径，每一个交换网段将包括一个跟桥。所有端口都在转发状态，其
他本广播域的交换机有一个根端口。正确
E.不看题目要求这句话没问题，但是题目要求对二层的描述，广播域就不和题意了
F vlan使转发基于二

fulltimes · 发表于 2011-6-23 17:13:19

这里不是网段，是一个交换网段，我理解是一个广播域。何况题目要选3项，你也不能选AF呀

haidong · 发表于 2011-6-23 18:06:33

题库都是很多人验证过的别根据自己主观就说有错误

飞扬梦天 · 发表于 2011-6-23 19:50:35

xbwfcbayern · 发表于 2011-6-23 22:02:14

Sky.return · 发表于 2011-6-23 22:14:23

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[已解决] ccna v104.4题库疑问

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