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Exam 300-420 All Questions

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Exam 300-420 topic 1 question 198 discussion

Actual exam question from Cisco's 300-420
Question #: 198
Topic #: 1
[All 300-420 Questions]

An engineer must design a routing solution for a company that is single-homed to an ISP. The company’s goal is to run BGP between the CE and the PE devices. To support running BGP, the company obtained a public AS number and IP subnet from ARIN. Which solution must the engineer select?

  • A. • The customer announces the default route to the ISP.
    • The ISP announces the default route to the customer.
  • B. • The customer announces the public IP subnet to the ISP.
    • The ISP announces the BGP table to the customer.
  • C. • The ISP announces the customer public IP subnet.
    • The ISP announces the partial BGP table to the customer.
  • D. • The customer announces the public IP subnet to the ISP.
    • The ISP announces the default route to the customer.
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Suggested Answer: D 🗳️
by jzzmth at April 13, 2023, 2:30 a.m.

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SpicyMochi
6 months, 1 week ago
Selected Answer: D
D. The customer announces the public IP subnet to the ISP, and the ISP announces the default route to the customer. In this scenario, to support running BGP between the CE and PE devices, the engineer must select the solution in which the customer announces the public IP subnet to the ISP, and the ISP announces the default route to the customer. This approach enables the customer to control the routing of their IP subnet while also receiving the default route from the ISP for reaching destinations outside of their network.
upvoted 3 times
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cerifyme85
6 months, 2 weeks ago
Selected Answer: D
yea.. single-homed.. ted_ba and jzzmth correct
upvoted 3 times
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cerifyme85
6 months, 2 weeks ago
Selected Answer: B
B would technically be correct too, if the customer wants the full routing table sent to them. If they dont then "neighbor default-originate " would suffice from ISP. However the question does not say if they want full table or just defaulte-route.. So I am itching for B
upvoted 1 times
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ted_ba
6 months, 3 weeks ago
the answer is D in BGP customer advertise his PUBLIC IP and ISP advertise defualt to customer
upvoted 3 times
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jzzmth
6 months, 3 weeks ago
Selected Answer: D
I think D is the better answer here. While both B and D would technically work, since the customer is single homed, D would match the requirements while reducing administrative overhead and resource utilization.
upvoted 2 times
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