关于CCNA题库（640-802）V104.3中的93题请教

kasime

QUESTION 93   这个题怎么选的A  看解析没看懂
Refer to the exhibit. The network is converged.After link-state advertisements are received from Router_A,
what information will Router_E contain in its routing table for the subnets 149.23.64 and 208.149.23.96?


A. 208.149.23.64[110/13] via 190.173.23.10,00:00:07,FastEthemet0/0
208.149.23.96[110/13] via 190.173.23.10,00:00:16,FastEthemet0/0
B. 208.149.23.64[110/1] via 190.172.23.10,00:00:07, Serial1/0
208.149.23.96[110/3] via 190.173.23.10,00:00:16, FastEthemet0/0
C. 208.149.23.64[110/13] via 190.173.23.10,00:00:07, Serial1/0
208.149.23.96[110/13] via 190.173.23.10,00:00:16, Serial1/0
208.149.23.96[110/13] via 190.173.23.10,00:00:16,FastEthemet0/0
D. 208.149.23.64[110/3] via 190.172.23.10,00:00:07, Serial1/0
208.149.23.96[110/3] via 190.173.23.10,00:00:16, Serial1/0
Answer: A
Explanation/Reference:
考点：考查OSPF cost值计算。cost=10的8次方除以带宽。在routerA上metric 12，到routerE经过100M网
络。
A：正确
B：错误，metric值不对。
C：错误，下一跳接口不对。
D：错误，metric值不对。

石小强

这个，有压力

kasime

石小强 发表于 2011-8-10 09:16
这个，有压力

呵呵  十分有压力

Kevin_Liu

等我去帮你叫人~

joely

坐等高手。。。

kasime

Kevin_Liu 发表于 2011-8-10 09:44
等我去帮你叫人~

谢谢

kasime

么有高人来吗？

roy

石小强 发表于 2011-8-10 09:16
这个，有压力

不是一般的有鸭梨。。。。

明天¤晴天℃

楼主是什么看不懂？解释的看不懂么？是不懂得怎么计算还是

supersniper

默认的 ospf的参考带宽是100000k, 即，100M的链路的cost是1，从f0/0学到的路由经过了一个百兆链路，所以他的metric加1，所以就为13，C选项下一跳接口不对，d选项metric不对，接口也不对........