Spanning tree, link aggregation and switch resiliency

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Explain the purpose of spanning tree in preventing Layer 2 switching loops and broadcast storms in redundant Ethernet topologies.
Interpret core spanning tree concepts, including root bridge election, root port, designated port, blocked or discarding states, and path cost.
Compare common spanning tree variants at a high level, including STP, RSTP, and MSTP, and identify the implementation outcome expected in a scenario.

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Explain link aggregation and implement an EtherChannel or port-channel concept using the correct member-link requirements and benefits.

Evaluate how redundant switch links, aggregated links, and spanning tree work together to provide switch resiliency without creating forwarding loops.

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