Two Cisco switches, SW-A and SW-B, need to form an EtherChannel. SW-A is configured with `channel-group 1 mode active`. To ensure the EtherChannel forms successfully, what specific mode must SW-B's corresponding interface be configured for?

To ensure the EtherChannel forms successfully, SW-B's corresponding interface must be configured for `channel-group 1 mode active` or `channel-group 1 mode passive`. This is because SW-A is configured with `mode active`, which implies the use of Link Aggregation Control Protocol (LACP), an open standard for EtherChannel negotiation. EtherChannel is a port-channeling technology that aggregates multiple physical Ethernet links into a single logical link. This aggregation provides increased bandwidth capacity and link redundancy, ensuring network uptime even if individual physical links fail. Traffic is load-balanced acros....