CCNA EIGRP Interview Questions and Answers

CCNA EIGRP Interview Questions and Answers


Are you preparing for a CCNA interview and need to brush up on your EIGRP (Enhanced Interior Gateway Routing Protocol) knowledge? Look no further! In this blog post, we will cover some common EIGRP interview questions and provide detailed answers to help you ace your interview.

1. What is EIGRP?

EIGRP is a Cisco proprietary routing protocol that allows for efficient and scalable routing within an enterprise network. It is an advanced distance-vector routing protocol known for its rapid convergence, load balancing capabilities, and support for multiple network layer protocols.

2. What are the advantages of EIGRP?

EIGRP offers several advantages, including:

  • Fast convergence: EIGRP quickly adapts to network changes, minimizing downtime in case of link failures.
  • Bandwidth efficiency: EIGRP efficiently uses available network bandwidth by sending only incremental updates.
  • Load balancing: EIGRP supports equal-cost load balancing, which distributes traffic across multiple paths.
  • Scalability: EIGRP can scale to support large networks with minimal impact on router resources.

3. How does EIGRP calculate the best path?

EIGRP uses the Diffusing Update Algorithm (DUAL) to calculate the best path to a destination. It considers several metrics, including bandwidth, delay, reliability, and load, to determine the overall path cost. EIGRP then selects the path with the lowest metric as the best path.

4. What is the administrative distance of EIGRP?

The administrative distance of EIGRP is 90 by default, which means it is preferred over routing protocols with higher administrative distances, including RIP and OSPF.


In this blog post, we covered some common CCNA EIGRP interview questions and provided detailed answers to help you prepare for your interview. Remember to review these questions and conduct further research to solidify your understanding of EIGRP. Good luck with your interview!

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