Which two options are two advantages of summarizing networks at the aggregation layer rather than at the core? (Choose two.)
A) It prevents the core from having unnecessary routes.
B) It no longer needs a core layer.
C) It prevents black hole routing.
D) It avoids network-wide impact upon VLAN changes local to the aggregation devices.

Question

Quizplus · Accepted Answer

Summarizing at the aggregation layer reduces the number of routes the core has to manage, preventing unnecessary routes (A). It also localizes changes, so VLAN changes at the aggregation layer don't affect the entire network (D).

Which Two Options Are Two Advantages of Summarizing Networks at the Aggregation