350-501 · Question #479
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…
The correct answer is B. configure terminal. To implement a blackhole for the specific host route 198.19.44.195/32, the network engineer 1. Define a prefix list: The prefix list BLACKHOLE-PERMIT must allow only the specific IP 198.19.44.195/32 to avoid affecting other destinations in the 198.19.44.0/24 block. 2. Static…
Question
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?
Exhibit
Options
- Aconfigure terminal
- Bconfigure terminal
- Cconfigure terminal
- Dconfigure terminal
How the community answered
(21 responses)- A5% (1)
- B76% (16)
- C5% (1)
- D14% (3)
Explanation
To implement a blackhole for the specific host route 198.19.44.195/32, the network engineer 1. Define a prefix list: The prefix list BLACKHOLE-PERMIT must allow only the specific IP 198.19.44.195/32 to avoid affecting other destinations in the 198.19.44.0/24 block. 2. Static route to Null0: The IP route for 198.19.44.195/32 must point to Null0, ensuring that traffic destined for this host is dropped. The tag 9090 is used for tracking and redistributing this blackhole route in BGP.
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