Which of the following facilitates hierarchical routing in OSPF?
- 1. Auto-summarization
- 2. Frequent SPF calculations
- 3. The election of designated routers
- 4. The use of multiple areas
Explanation: OSPF supports the concept of areas to prevent larger routing tables, excessive SPF calculations, and large LSDBs. Only routers within an area share link-state information. This allows OSPF to scale in a hierarchical fashion with all areas that connect to a backbone area.
Exam with this question: 1.4.2 Module Quiz - Single-Area OSPFv2 Concepts
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