Which statement best describes convergence of a network?
1. The amount of time required to share administrative configuration changes, such as password changes, from one en of a network to the other end.
2. The time required for the routers in the network to update their routing tables after a topology change has occurred.
3. The time required for the routers in one autonomous system to learn routes to destinations in another system.
4. The time required for routers running disparate routing protocols to update their routing tables.