A.00000 B.12345 C.23456 D.65000 E.99999
A.a root port being transitioned to the blocking state B.a port being assigned as a root port C.a port being assigned as an alternate port D.a root port being transitioned to the forwarding state
A.root port,designated port,alternate port,backup port,and disabled B.standby port,alternate port,root port,and disabled C.standby port,designated port,backup port,and disabled D.root port,designated port,alternate port,and standby port