my knowlege is the Designated Port in STP is used for forwarding frame for a subnet. for example ports PC's are connected to a vlan on a switch are Designated because they are actively forwarding frames and they are edge ports. can some correct me if i am wrong. since root port can only receives hello from the root bridge, they cannot send out hellos right?
Also the Root port only receives hello from the root and once the switch updates the hello when a convergence happens, they send out the hello through the Designated port not the Root port. right?