Refer to the exhibit. The network engineer who manages ASN 65001 is troubleshooting suboptimal routing to the 198.18.15.0/24 prefix. According to the network requirements: - Routing to IP…

This option uses AS-path prepending with the local AS (65001) which is not typically used for influencing internal path selection or specific egress points as Local Preference does, and it also sets the Local Preference values in a way that doesn't align with the requirement for 198.18.15.128/25.

This configuration uses BGP Local Preference, where a higher value is preferred. By setting Local Preference 200 for 198.18.15.0/25 (to be preferred via EDGE-1) and Local Preference 100 for 198.18.15.128/25 (to be preferred via EDGE-2), the prefixes are directed to their intended egress points within the autonomous system based on their relative preference. The prefix-list correctly prevents advertising more specific prefixes beyond ASN 64611.

This option incorrectly assigns Local Preference values; it sets a lower preference (100) for 198.18.15.0/25, which is supposed to be preferred via EDGE-1, and a higher preference (200) for 198.18.15.128/25, contradicting the desired routing outcome where EDGE-1 is primary for 0/25 and EDGE-2 for 128/25.

This option incorrectly uses AS-path prepending with the local AS (65001) which is generally unsuitable for the stated requirements. Additionally, while the LP values for 198.18.15.0/25 are consistent, the use of AS-path prepend and the LP for 198.18.15.128/25 doesn't meet the requirement for preferred routing via EDGE-2.