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Interview Questions: OSPF area types, router types , network types.

  1. Why area 0 is called backbone area?
  2. How does summarization work in OSPF in case have A1-A0-A2?
  3. Can we connect a router which is not directly connected to back-bone area but still needed in OSPF domain? If yes ? How?
  4. What are the different route types with area , exchange crossed area and from different routing-domains?
  5. What is default route type for external route?
  6. What is the difference between Broadcast network and NMBA?
  7. Which router does summarization and which router exchanges routes across different areas and from different routing domain?

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