A. 30 second timer expires
B. whenever the network topology changes
C. immediately after the Bellman-Ford algorithm has run
D. immediately after the DUAL FSM has built the topology database
E. upon initial startup of router or routing protocol
B. whenever the network topology changes
C. immediately after the Bellman-Ford algorithm has run
D. immediately after the DUAL FSM has built the topology database
E. upon initial startup of router or routing protocol