OSPF CCNA Questions and Answers

OSPF CCNA Questions and Answers

Are you preparing for the CCNA exam and want to test your knowledge on OSPF? Look no further! In this blog post, we have compiled a comprehensive list of OSPF questions and answers that will help you ace your certification exam. Whether you are a beginner or an experienced network engineer, these questions will challenge your understanding of OSPF protocol, its configuration, and troubleshooting. Let’s dive in!

Question 1: What does OSPF stand for?

Answer: Open Shortest Path First

Question 2: What is the administrative distance of OSPF?

Answer: The administrative distance of OSPF is 110.

Question 3: How does OSPF select the best path to a destination?

Answer: OSPF uses the Shortest Path First (SPF) algorithm to determine the best path to a destination. It calculates the path based on the cost metric, which is typically derived from the interface bandwidth.

Question 10: What is the purpose of OSPF Area Border Router (ABR)?

Answer: The OSPF Area Border Router (ABR) is responsible for connecting multiple OSPF areas together. It maintains a separate link-state database for each area it connects and performs route summarization to reduce the amount of LSAs flooding between areas.

Question 11: How can I troubleshoot OSPF neighborship issues?

Answer: When troubleshooting OSPF neighborship issues, you can perform the following steps:

  1. Check if there is IP connectivity between neighboring routers.
  2. Verify OSPF configuration, ensuring that the OSPF process ID, area ID, and network statements are correctly configured.
  3. Review OSPF neighbor states using the show ip ospf neighbor command.
  4. Check for any mismatched OSPF parameters, such as hello/interval timers and authentication settings.
  5. Inspect OSPF interface status using the show ip ospf interface command.


In this blog post, we covered some common OSPF questions and answers to help you reinforce your knowledge of OSPF protocol for the CCNA exam. Remember to continue exploring more OSPF concepts and practice implementing it in a lab environment. Good luck with your CCNA journey!

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