Each LSA has its own age timer. By default, how long does an LSA wait before requiring an update?

Each LSA has its own age timer. By default, how long does an LSA wait

1.	Each LSA has its own age timer. By default, how long does an LSA wait before requiring an update?
A.	30 seconds
B.	1 minute
C.	30 minutes
D.	1 hour
Answer» D. 1 hour