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Cisco Certified Network Associate (CCNA) · Cisco
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Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
The keyword is LACP ( NEIGHBOR )
ChatGPT-4 answered this question incorrectly (option C) until I pointed out that the ET1/0 and ET1/1 interfaces did not belong to SW1. It then used the correct logic to select option B.
In configuring Dynamic EtherChannel, with PAgP, at least one of the two sides must use desirable, and with LACP, at least one of the two sides must use active. The question is showing the other device with SP code...means, its LACP is PASSIVE. Therefore, opposite device's LACP configuration must be ACTIVE.