Correct Answer: EtherChannel bundling on multi-link connections to a single provider where applicable, combined with ECMP routing across the equal-cost paths to different providers, and health monitoring on all links
Explanation: The most resilient, efficient design combines EtherChannel where multiple links go to the same provider, ECMP across equal-cost paths to different providers, and health monitoring, unlike a single unbundled link with no ECMP, EtherChannel with no routing integration, mismatched administrative distances (which breaks ECMP eligibility), disabling health monitoring, or manual per-packet path selection.
Correct Answer: EtherChannel bundling on multi-link connections to a single provider where applicable, combined with ECMP routing across the equal-cost paths to different providers, and health monitoring on all links
Explanation: The most resilient, efficient design combines EtherChannel where multiple links go to the same provider, ECMP across equal-cost paths to different providers, and health monitoring, unlike a single unbundled link with no ECMP, EtherChannel with no routing integration, mismatched administrative distances (which breaks ECMP eligibility), disabling health monitoring, or manual per-packet path selection.