Which IEEE standard originally defined the Spanning Tree Protocol?

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Multiple Choice

Which IEEE standard originally defined the Spanning Tree Protocol?

Spanning Tree Protocol prevents loops in switched Ethernet by electing a root bridge and blocking redundant links so only one active path remains between switches. This behavior was originally defined by the IEEE standard IEEE 802.1D. That standard specifies how the network elects a root bridge, assigns port roles (root port, designated port, and blocked port), and converges to a loop-free tree as topology changes. Other standards cover VLAN tagging (802.1Q), general Ethernet framing and transmission (802.3), and Wi‑Fi (802.11ac). The original definition of STP is found in 802.1D.

Spanning Tree Protocol prevents loops in switched Ethernet by electing a root bridge and blocking redundant links so only one active path remains between switches. This behavior was originally defined by the IEEE standard IEEE 802.1D. That standard specifies how the network elects a root bridge, assigns port roles (root port, designated port, and blocked port), and converges to a loop-free tree as topology changes. Other standards cover VLAN tagging (802.1Q), general Ethernet framing and transmission (802.3), and Wi‑Fi (802.11ac). The original definition of STP is found in 802.1D.

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