Exam 350-501 topic 1 question 410 discussion

Actual exam question from Cisco's 350-501

Question #: 410
Topic #: 1

Refer to the exhibit. Customer C-101 in ASN 65123 requested that the ISP blackholes a host route 198.19.44.195, to which the customer is receiving a significant amount of malicious traffic. Which configuration must the network engineer implement on the trigger router TR-1 to fulfill the request without affecting other IP destinations in the customer’s block?

A. configure terminal
ip prefix-list BLACKHOLE-PERMIT seq 5 permit 198.19.44.0/24 le 32 ip route 198.19.44.195 255.255.255.255 Null0 tag 9090 end
B. configure terminal
ip prefix-list BLACKHOLE-PERMIT seq 5 permit 198.19.44.195/32 ip route 198.19.44.195 255.255.255.255 Null0 tag 9090 end
C. configure terminal
ip prefix-list BLACKHOLE-PERMIT permit 198.19.44.0/24 le 32
ip route 198.19.44.195 255.255.255.255 Null0 tag 9090
end
D. configure terminal
ip prefix-list BLACKHOLE-PERMIT permit 198.19.44.195/24
ip route 198.19.44.195 255.255.255.255 Null0 tag 9090
end

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Suggested Answer: B 🗳️

by ashwind123 at June 10, 2025, 12:34 p.m.

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ashwind123

5 days, 7 hours ago

Selected Answer: B

B is correct as we need permit sequence and also its host route hence /32

upvoted 1 times

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