You learned how Layer loops cause broadcast storms and MAC table instability. STP prevents loops by electing a root bridge and blocking redundant paths. BPDUs carry topology information between switches. Port roles (root, designated, blocked) and states (blocking, learning, forwarding) determine traffic flow. RSTP dramatically improves convergence using proposal-agreement handshakes. Link aggregation combines multiple links into one bundle, providing bandwidth and redundancy. LACP dynamically negotiates bundles and detects failures.
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$ curl repovive.com/roadmaps/network-design/spanning-tree-and-link-aggregation/section-3-recap
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