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Exam 300-101 topic 2 question 533 discussion

Actual exam question from Cisco's 300-101
Question #: 533
Topic #: 2
[All 300-101 Questions]

Refer to the exhibit.

A Boston company bought the assets of a New York company and is trying to route traffic between the two data networks using EIGRP. The show command output shows that traffic will not flow between the networks. As a network consultant, you were asked to modify the configuration and certify the interoperability of the two networks. For traffic to flow from subnet 172.16.8.0/24 to the 172.16.16.0/24 subnet.
Which configuration change do you recommend?

  • A. Turn off autosummarization on routers N1 and B1.
  • B. Add IP summary addresses to the Internet-pointing interfaces of routers N1 and B1.
  • C. Turn off auto summarization on routers N2 and B2.
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Suggested Answer: D. Add wildcard masks to the network commands on routers N2 and B2. 🗳️
Basically auto route summarization happens at the classful network boundary...so that would make N1 and B1 the locations that summarization would occur for the 172.16.0.0/16 classful networks.
So if you left auto-summarization enabled on those 2 routers, you would have an issue with discontiguous networks being advertised by both routers N1 and B1 with their classful mask (172.16.0.0/16 and 10.0.0.0/8), which will cause you issues.
Turning off auto-summarization on N2 and B2 wouldn't make any difference, as their networks wouldn't be summarized due to the fact that they are not meeting a classful boundary on their perspective routers. N1 will receive the 172.16.8.0/24 network from N2 with auto-summarization enabled.
by diegonamaste at Feb. 20, 2020, 10:24 p.m.

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diegonamaste
5 years, 2 months ago
A. Turn off autosummarization on routers N1 and B1.
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