What is the default BPDU hello interval for STP?

The default Bridge Protocol Data Unit (BPDU) hello interval for Spanning Tree Protocol (STP) is set to 2 seconds. This interval dictates how frequently a switch sends BPDUs to evaluate the topology of the network. The purpose of BPDUs is to share information about the network's status and to help prevent loops by determining which ports should be designated or blocked.

Understanding the significance of the 2-second interval helps navigate and maintain an efficient switching environment. It ensures that the topology information is fresh and that switches can quickly react to changes in the network. If the interval were shorter, it could lead to unnecessary network traffic, while a longer interval might slow down the convergence process when network changes occur. Hence, the 2-second default strikes a balance between timely updates and efficient use of bandwidth in a switched network.