If the RSTP port cost is 200, what is the corresponding link speed?

The correct answer indicates that a port cost of 200 correlates with a link speed of 100 Gbps. In the context of Rapid Spanning Tree Protocol (RSTP), the port cost is a metric that reflects the speed of the link in order to determine the most efficient path through the network.

Port costs are derived from the link speed, and they adhere to predefined values specified by the IEEE 802.1D standard. Each link speed corresponds to a specific cost; for example, higher bandwidth links generally have lower port costs. In this case, a port cost of 200 typically aligns with a high-speed link, such as 100 Gbps.

This means that if you have a port cost of 200, it suggests the link speed is robust enough to support such a cost, confirming the association with 100 Gbps. Understanding these port costs is crucial in network design, as it helps engineers and administrators efficiently manage data paths and avoid potential broadcast storms or loops in a switched network environment.