Which two statements correctly describe RSTP port roles?

In Rapid Spanning Tree Protocol (RSTP), there are several port roles that determine the behavior of the port in the spanning tree 1 .

Option A suggests that the designated port forwards data to the downstream network segment or device.  This is correct because the designated port is the port on a network segment that has the best path to the root bridge 1 .  It’s responsible for forwarding frames towards the root bridge and sending configuration messages into its segment 1 .

Option D suggests that the root port is responsible for forwarding data to the root bridge.  This is also correct because the root port is always the link directly connected to the root bridge, or the shortest path to the root bridge 1 .  It’s used to forward traffic towards the root bridge 1 .

Therefore, options A and D are correct.