What is the cost of an RSTP port with a speed of 10 Tbps?

In Rapid Spanning Tree Protocol (RSTP), the cost of a port is determined based on the speed of the link. The cost values follow a specific predefined scale that indicates the relative cost of transmitting data over that link. The cost is calculated according to the following standard:

• For links with a speed of 10 Gbps (Gigabits per second), the cost is typically set to 2.

• If the link speed would have been higher, such as 100 Gbps or more, the cost values would usually decrease, reflecting the increased efficiency of higher-speed links.

In this scenario, a port with a speed of 10 Tbps is operating at a much higher capacity than standard cost calculations, but if we were to consider the current definitions surrounding RSTP according to established values, the closest association would indeed render a port cost of 2, highlighting that it has a relatively low cost compared to standard Ethernet links.

Therefore, the correct answer reflects the established understanding of port costs within the RSTP context, designating that high-speed connections maintain a proportional cost metric which, for a link at this speed, assigns the cost value as 2.