Exam 300-420 topic 1 question 104 discussion

Actual exam question from Cisco's 300-420

Question #: 104
Topic #: 1

Refer to the exhibit. An engineer is designing a BGP solution for a client that peers with ISP1 for full Internet connectivity and with ISP2 for direct exchange of routes for several third parties. Which action, when implemented on the edge routers, enables the client network to reach the Internet through ISP1?

A. Run an eBGP session within different VRFs for each ISP.
B. Advertise a default route for downstream routers within the client network.
C. Apply the AS-path prepend feature for ISP2.
D. Apply route filtering such that the client advertises only routes originated from its own AS.

Show Suggested Answer

Suggested Answer: B 🗳️

by cerifyme85 at March 27, 2023, 4:26 a.m.

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neiker45

10 months ago

You can provide your client's network access through a specific ISP by simply setting up a default route going through that ISP to the downstream routers.

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salmarin

10 months, 1 week ago

Selected Answer: B

advertise default route to downstream routers.

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Nickplayany

1 year, 6 months ago

Selected Answer: B

B is the answer

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cerifyme85

1 year, 7 months ago

Sorry guys B seems correct.. using neigh default-originate or network 0.0.0.0 at isp

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cerifyme85

1 year, 7 months ago

Selected Answer: D

I will go with either A or D.. with D as my preference

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cerifyme85

1 year, 7 months ago

hmmm not sure I agree with B.. how does it handle segregation of traffic to internet?

upvoted 1 times

vins0

1 year, 6 months ago

Default route for all internet traffic, for third party there will be more specific routes from ISP2. Anything else non-specific would take default route.

upvoted 2 times

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