Which of the following two are effective and simple means of employing route summarization within the Enterprise Campus network? (Choose two)

Question

Options

• AA default route (0.0.0.0 /0) advertised dynamically into the rest of the network
• BRoute filtering to manage traffic flows in the network, avoid inappropriate transit traffic through
• CUse manual split horizon
• DUse a structured hierarchical topology to control the propagation of EIGRP queries
• EOpen Shortest Path First (OSPF) stub areas

• A
  84% (21)
• B
  8% (2)
• C
  4% (1)
• D
  4% (1)

Explanation

A dynamically advertised default route (0.0.0.0/0) is the simplest possible summary-it collapses all external or unknown destinations into a single advertisement, dramatically reducing routing table size and update traffic (A). OSPF stub areas prevent Type 5 external LSAs from entering the area and instead rely on a default route from the ABR, which is a built-in, simple summarization mechanism requiring minimal configuration (E). Route filtering (B) manages traffic flows but is not summarization. Manual split horizon (C) is a loop-prevention mechanism. Controlling EIGRP query propagation (D) is an EIGRP scalability technique, not route summarization.

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