CCNA Interview Questions

CCNA Interview Questions


Welcome to our blog post on CCNA interview questions! If you are preparing for a Cisco Certified Network Associate (CCNA) interview, you’ve come to the right place. In this article, we will discuss some of the most common and relevant interview questions that are frequently asked during the hiring process for network engineering positions.

Technical Questions

1. What is a VLAN?

A VLAN (Virtual Local Area Network) is a logical grouping of network devices on the same broadcast domain. It enables network administrators to segment their networks to improve network performance and security by dividing the network into multiple smaller networks.

2. Explain the difference between a router and a switch.

A router is a networking device that connects multiple networks together and forwards data packets between them based on IP addresses. It operates at the network layer of the OSI model. On the other hand, a switch is a networking device that connects multiple devices within a network and forwards data packets between them based on MAC addresses. It operates at the data link layer of the OSI model.

3. What are the different types of routing protocols?

There are two main types of routing protocols:

  • Interior Gateway Protocols (IGPs): These protocols are used within an autonomous system, such as RIP (Routing Information Protocol) and OSPF (Open Shortest Path First).
  • Exterior Gateway Protocols (EGPs): These protocols are used between autonomous systems, such as BGP (Border Gateway Protocol).

4. What is the purpose of ARP (Address Resolution Protocol)?

ARP is used to associate an IP address with a physical (MAC) address. It resolves IP addresses to MAC addresses on a local network, allowing devices to communicate with each other.

Non-Technical Questions

1. How do you handle stressful situations when troubleshooting network issues?

When faced with stressful situations, I try to remain calm and focused. I prioritize the troubleshooting steps and work methodically through them. I also believe in effective communication and collaboration, so I make sure to involve other team members if necessary.

2. Describe a time when you faced a challenging network problem and how you resolved it.

Once, I encountered a network outage that affected multiple departments in the organization. I carefully analyzed network logs and used network monitoring tools to identify the root cause. It turned out to be a misconfiguration in the core switch. I quickly rectified the configuration and tested the network connectivity, bringing services back online.


In this blog post, we covered some essential CCNA interview questions, both technical and non-technical. These questions will help you prepare for your upcoming CCNA interview and showcase your expertise in network engineering. Remember to practice your answers and demonstrate your troubleshooting skills and knowledge of networking concepts. Good luck with your interview!

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