What are the benefits of the hierarchical design approach that is used in large OSPF networks? (Choose three.)

  1. reduction of routing overhead *
  2. increased routing overhead
  3. faster convergence*
  4. slower convergence
  5. distribution of network instability to all areas of the network
  6. isolation of network instability to one area of the network*
A groan grasps the peanut near the offending anthology.