maotoo 发表于 2011-12-2 11:16:58

EIGRP QUESTION 256 没看懂题目 请达人详解下 谢谢

本帖最后由 maotoo 于 2011-12-2 17:17 编辑

QUESTION 256
Refer to the exhibit. BigBids Incorporated is a worldwide auction provider. The network uses EIGRP as its
routing protocol throughout the corporation. The network administrator does not understand the
convergence of EIGRP.
Using the output of the show ip eigrp topology all-links command, answer the administrator’s questions.
Which two networks does the Core1 device have feasible successors for? (Choose two)
A. 172.17.0.0/30
B. 172.17.1.0/24
C. 172.17.2.0/24
D. 172.17.3.0/25
E. 172.17.3.128/25
F. 10.140.0.0/24
Answer: AF
Section: EIGRP
Explanation/Reference:
可行后继

allencheng 发表于 2011-12-2 13:31:24

首先，至少要有两条路径到达目的地；然后，第二条的AD要小于Successor的FD，就成为FS了。

10.140.0.0/24 的第二条AD是155160 小于 156160， OK；
172.17.0.0/30 的第二条AD是20513560 小于20514560， OK.

maotoo 发表于 2011-12-2 17:15:11

呃 突然想明白了 看题目的时候短路了

maotoo 发表于 2011-12-2 17:15:26

sdwchow 发表于 2011-12-2 15:03 static/image/common/back.gif
1>network uses EIGRP.
2>administrator不懂所以问你
下图中哪2个网络是core1的FS？


谢谢

maotoo 发表于 2011-12-2 17:15:43

allencheng 发表于 2011-12-2 13:31 static/image/common/back.gif
首先，至少要有两条路径到达目的地；然后，第二条的AD要小于Successor的FD，就成为FS了。

10.140.0.0/24 ...

谢谢

越坦然越想念 发表于 2013-1-15 11:16:30

C怎么不对呢
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