Which BPDU frame type identifies parameters such as root path cost and local bridge identifier?

The Configuration BPDU is fundamental in Ethernet networks that employ the Spanning Tree Protocol (STP). This type of BPDU serves to convey essential information about the network topology, including parameters such as the root path cost and the local bridge identifier.

The root path cost is a metric that determines the least expensive path to the root bridge, while the local bridge identifier uniquely identifies the sending switch in the network topology. This information allows switches to collaborate effectively in maintaining a loop-free environment by making informed decisions about which ports should be activated or put into a blocking state.

Understanding these parameters is critical for the proper functioning of STP and for ensuring that the network can dynamically adapt to changes in topology while maintaining optimal performance and resilience. This aspect of BPDUs is crucial for network engineers seeking to implement and manage enterprise networks effectively.