MSTP has different port roles.
Which statements are false?
A . Other ports except the edge port participate in MSTP calculation.
B . A port can function as different roles in different MSTIs.
C . A regional edge port is located at the edge of an MST region and connected to ports of other MST regions or SSTs.
D . The backup port functions as the backup of the root port, and provides a path from the designated bridge to the root bridge.
Answer: D