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You are here: Home / SWITCH / Module 3 / 802.1D Spanning Tree Protocol – Spanning Tree Bridge Protocol Data Units

802.1D Spanning Tree Protocol – Spanning Tree Bridge Protocol Data Units

All switches that reside in the Spanning Tree domain communicate and exchange messages using Bridge Protocol Data Units (BPDUs). The exchange of BPDUs is used by STP to determine the network topology. The topology of an active switched network is determined by the following three variables:

  1. The unique MAC address (switch identifier) that is associated with each switch
  2. The Path Cost to the Root Bridge associated with each switch port
  3. The port identifier (MAC address of the port) associated with each switch port

In the Spanning Tree domain, all switches send BPDUs . . .

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