What is 802.1d?

IEEE 802.1D is a Media Access Control (MAC) Bridging standard that specifies the Spanning Tree Protocol (STP). STP enables a network to have redundant paths while preventing loops, which can cause broadcast storms and network instability. It operates by logically blocking redundant paths and activating them only if the primary path fails, ensuring a loop-free topology. This is commonly used in Ethernet networks to maintain a stable and efficient network infrastructure.